icourses.cn Website Information

Daily Unique Visits: 34,588

Daily Page Views: 207,528

Income Per Day: $415

Estimated Value: $298,800

icourses.cn is registered under .CN top-level domain. Please check other sites in .CN zone.

No name server records were found.

and is probably hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN. See the full list of other websites hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN.

The highest website icourses.cn position in Alexa rank database was 36788 and the lowest rank position was 41674. Current position of icourses.cn in Alexa rank database is 41466.

Desktop speed score of icourses.cn (56/100) is better than the results of 30.56% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of icourses.cn (67/100) is better than the results of 18.73% of other sites and means that the page is not mobile-friendly.

Mobile speed score of icourses.cn (31/100) is better than the results of 10.59% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

icourses.cn Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

icourses.cn whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

Domain Name: icourses.cn
ROID: 20111025s10001s74962504-cn
Domain Status: ok
Registrant: 高等教育出版社有限公司
Registrant Contact Email: liuying3@hep.com.cn
Sponsoring Registrar: 北京万维通港科技有限公司
Name Server: ns.dns.net.cn
Name Server: ns7.dns.net.cn
Registration Time: 2011-10-25 12:26:21
Expiration Time: 2026-10-25 12:26:21
DNSSEC: unsigned

icourses.cn server information

Servers Location

icourses.cn desktop page speed rank

Last tested: 2019-12-14

Desktop Speed Bad

56/100

icourses.cn Desktop Speed Test Quick Summary

priority - 57Optimize images

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priority - 13Leverage browser caching

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priority - 9Enable compression

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priority - 3Minify HTML

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priority - 2Eliminate render-blocking JavaScript and CSS in above-the-fold content

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http://www.icourses.cn/web/icourse/lib/bootstrap/css/bootstrap.min.css

icourses.cn Desktop Resource Breakdown

Total Resources	60
Number of Hosts	6
Static Resources	52
JavaScript Resources	1

icourses.cn mobile page speed rank

Last tested: 2016-10-11

Mobile Speed Bad

31/100

icourses.cn Mobile Speed Test Quick Summary

priority - 83Optimize images

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priority - 72Leverage browser caching

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priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 6 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://static1.icourses.cn/sns/js/common/jquery.min.js
http://static1.icourses.cn/cms/jpk/js/global.js
http://static1.icourses.cn/cms/common/lhgdialog4/l…og.min.js?skin=idialog
http://static1.icourses.cn/cms/jpk/js/map.js
http://static1.icourses.cn/common/js/header.js
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Optimize CSS Delivery of the following:

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http://static1.icourses.cn/cms/jpk/css/dark.css

priority - 15Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 143.8KiB (69% reduction).

Compressing http://static1.icourses.cn/sns/js/common/jquery.min.js could save 59.7KiB (64% reduction).
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Compressing http://static1.icourses.cn/cms/jpk/css/gxxt.css could save 22.3KiB (86% reduction).
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Compressing http://static1.icourses.cn/cms/jpk/js/global.js could save 1.6KiB (70% reduction).
Compressing http://static1.icourses.cn/cms/jpk/js/map.js could save 1.1KiB (70% reduction).
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priority - 10Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://icourses.cn/
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priority - 2Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 18.8KiB (41% reduction).

Minifying http://static1.icourses.cn/cms/common/lhgdialog4/l…og.min.js?skin=idialog could save 18KiB (42% reduction).
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priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 4.7KiB (16% reduction).

Minifying http://static1.icourses.cn/cms/jpk/css/v_base.css could save 3.3KiB (16% reduction).
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priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 3.6KiB (16% reduction).

Minifying http://www.icourses.cn/home/ could save 2.8KiB (15% reduction) after compression.
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icourses.cn Mobile Resource Breakdown

Total Resources	115
Number of Hosts	9
Static Resources	96
JavaScript Resources	10
CSS Resources	5

icourses.cn mobile page usability

Last tested: 2016-10-11

Mobile Usability Medium

67/100

icourses.cn Mobile Usability Test Quick Summary

priority - 37Use legible font sizes

The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

收藏本站 and 4 others render only 5 pixels tall (12 CSS pixels).

登录 renders only 5 pixels tall (12 CSS pixels).

｜ and 1 others render only 5 pixels tall (12 CSS pixels).

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支持终身学习，让每一位有提升…最好学校的课程，并获得认证。 renders only 5 pixels tall (12 CSS pixels).

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priority - 10Configure the viewport

Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

priority - 3Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="javascript:void(0)">收藏本站</a> and 2 others are close to other tap targets.

The tap target <a href="http://www.icourses.cn/home/">首页</a> is close to 1 other tap targets.

The tap target <a class="active">1</a> is close to 2 other tap targets.

The tap target <a>2</a> and 3 others are close to other tap targets.

The tap target <a href="http://computer.icourses.cn/">中国高校计算机教育MOOC联盟</a> is close to 1 other tap targets.

The tap target <a href="http://www.ico…tz/index1.html" class="more">更多>></a> is close to 2 other tap targets.

The tap target <a href="http://www.ico…8/t_10027.html">· 教育部办公厅公布第一批“国家级精品资源共...</a> and 10 others are close to other tap targets.

The tap target <a href="http://www.ico…0/t_10432.html">9月26日，高校思想政治理论…网中国大学MOOC开课...</a> and 19 others are close to other tap targets.

The tap target <a href="http://www.ico…0/t_10435.html">· 武大版思政课登上国家级慕课平台</a> and 12 others are close to other tap targets.

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icourses.cn HTML validation

Errors

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Line: 1 Column: 1 - 121
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html..."

Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)

Line: 42 Column: 4 - 10
"..._div"> <style> .logi..." Line: 225 Column: 5 - 11
"...s" /> <style> .na..." Line: 385 Column: 1 - 7
"... </div> <style> .navt..." Line: 699 Column: 6 - 12
"...div> <style> ...." Line: 1796 Column: 5 - 11
"...div> <style> .vid..."

Bad value “” for attribute “name” on element “input”: Must not be empty.

Line: 177 Column: 52 - 61
".../div></a> <input name="" type="checkbox" value="" checked class="login_rad" /> ..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 189 Column: 14 - 100
"... 立即注册<img src="http://static1.icourses.cn/cms/jpk/images/goon.png" width="11" height="10" /> ..." Line: 355 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171130/20171130111753111ff8080815f04cadf01600574c175002c.jpg" /> ..." Line: 360 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171121/20171121102041968ff8080815f04cadf015fdc6028f20022.jpg" /> ..." Line: 365 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171127/20171127132439402ff8080815f04cadf015ffbee6ae20027.jpg" /> ..." Line: 370 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171115/20171115091957355ff8080815f04cadf015fbd4257bf0017.jpg" /> ..." Line: 375 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171113/20171113151653154ff8080815f04d645015fb43caa730034.jpg" /> ..." Line: 380 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171113/20171113151606229ff8080815f04d645015fb43bf319002f.jpg" /> ..." Line: 421 Column: - 172
"......" Line: 439 Column: - 172
"......" Line: 457 Column: - 172
"......" Line: 475 Column: - 172
"......" Line: 493 Column: - 172
"......" Line: 511 Column: - 172
"......" Line: 529 Column: - 172
"......" Line: 547 Column: - 172
"......" Line: 2070 Column: 123 - 191
"..., 500);' ><img src="http://static1.icourses.cn/cms/jpk/images/gotop_ico.png" /></a></..."

Bad value “960px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.

Line: 355 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171130/20171130111753111ff8080815f04cadf01600574c175002c.jpg" /> ..." Line: 360 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171121/20171121102041968ff8080815f04cadf015fdc6028f20022.jpg" /> ..." Line: 365 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171127/20171127132439402ff8080815f04cadf015ffbee6ae20027.jpg" /> ..." Line: 370 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171115/20171115091957355ff8080815f04cadf015fbd4257bf0017.jpg" /> ..." Line: 375 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171113/20171113151653154ff8080815f04d645015fb43caa730034.jpg" /> ..." Line: 380 Column: 8 - 154
"..."> <img width="960px" height="300px" src="http://www.icourses.cn/gjjpkc/docattach/20171113/20171113151606229ff8080815f04d645015fb43bf319002f.jpg" /> ..."

Bad value “300px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

No space between attributes.

Line: 578 Column: - 49
"...x;height:80px;"src="http://dyn..." Line: 593 Column: - 49
"...x;height:80px;"src="http://dyn..." Line: 608 Column: - 49
"...x;height:80px;"src="http://dyn..." Line: 623 Column: - 49
"...x;height:80px;"src="http://dyn..." Line: 638 Column: - 49
"...x;height:80px;"src="http://dyn..." Line: 653 Column: - 49
"...x;height:80px;"src="http://dyn..." Line: 668 Column: - 49
"...x;height:80px;"src="http://dyn..." Line: 683 Column: - 49
"...x;height:80px;"src="http://dyn..."

Stray end tag “img”.

Line: 717 Column: 325 - 330
"...alt="左玉辉"></img></a> ..." Line: 733 Column: 325 - 330
"...alt="李尚志"></img></a> ..." Line: 749 Column: 325 - 330
"...alt="郭齐勇"></img></a> ..." Line: 765 Column: 325 - 330
"...alt="蔡自兴"></img></a> ..." Line: 781 Column: 324 - 329
"... alt="陈洪"></img></a> ..." Line: 824 Column: 250 - 255
"...480.jpg" ></img></a> ..." Line: 841 Column: 244 - 249
"...480.jpg" ></img></a> ..." Line: 854 Column: 244 - 249
"...480.jpg" ></img></a> ..." Line: 966 Column: 251 - 256
"...480.jpg" ></img></a> ..." Line: 982 Column: 249 - 254
"...480.jpg" ></img></a> ..." Line: 995 Column: 263 - 268
"...480.jpg" ></img></a> ..." Line: 1081 Column: 243 - 248
"...480.jpg" ></img></a> ..." Line: 1098 Column: 251 - 256
"...480.jpg" ></img></a> ..." Line: 1111 Column: 247 - 252
"...480.jpg" ></img></a> ..." Line: 1197 Column: 246 - 251
"...480.jpg" ></img></a> ..." Line: 1214 Column: 267 - 272
"...480.jpg" ></img></a> ..." Line: 1227 Column: 267 - 272
"...480.jpg" ></img></a> ..."

Bad value “320px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.

Line: 824 Column: 96 - 249
"...="_blank"><img onerror="campusCoursePicError(this)" width="320px" height="140px" alt="中国近现代史纲要" src="http://dynamic1.icourses.cn/coursepic/2013/0704/6092_480.jpg" ></img>..." Line: 966 Column: 95 - 250
"...="_blank"><img onerror="campusCoursePicError(this)" width="320px" height="140px" alt="葡萄酒生产技术与工艺" src="http://dynamic1.icourses.cn/coursepic/2013/0517/2576_480.jpg" ></img>..." Line: 1081 Column: 92 - 242
"...="_blank"><img onerror="campusCoursePicError(this)" width="320px" height="140px" alt="社会学概论" src="http://dynamic1.icourses.cn/coursepic/2014/0505/7350_480.jpg" ></img>..." Line: 1197 Column: 92 - 245
"...="_blank"><img onerror="campusCoursePicError(this)" width="320px" height="140px" alt="中学教师专业发展" src="http://dynamic1.icourses.cn/coursepic/2013/0105/5048_480.jpg" ></img>..."

Bad value “140px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

Bad value “130px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.

Line: 841 Column: 95 - 243
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="数控技术" src="http://dynamic1.icourses.cn/coursepic/2012/1213/4125_480.jpg" ></img>..." Line: 854 Column: 95 - 243
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="离散数学" src="http://dynamic1.icourses.cn/coursepic/2013/0916/6447_480.jpg" ></img>..." Line: 982 Column: 98 - 248
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="建筑节能技术" src="http://dynamic1.icourses.cn/coursepic/2014/0508/6054_480.jpg" ></img>..." Line: 995 Column: 105 - 262
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="制冷设备电气与控制系统检修" src="http://dynamic1.icourses.cn/coursepic/2013/0514/3492_480.jpg" ></img>..." Line: 1098 Column: 99 - 250
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="毛泽东思想概论" src="http://dynamic1.icourses.cn/coursepic/2014/1230/5808_480.jpg" ></img>..." Line: 1111 Column: 97 - 246
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="动物繁殖学" src="http://dynamic1.icourses.cn/coursepic/2014/1223/7334_480.jpg" ></img>..." Line: 1214 Column: 107 - 266
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="中学英语课程标准研究与教材分析" src="http://dynamic1.icourses.cn/coursepic/2012/1225/5077_480.jpg" ></img>..." Line: 1227 Column: 107 - 266
"...="_blank"><img onerror="campusCoursePicError(this)" width="130px" height="80px" alt="中学地理学科课程标准与教材研究" src="http://dynamic1.icourses.cn/coursepic/2014/0112/4779_480.jpg" ></img>..."

Bad value “80px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

The “font” element is obsolete. Use CSS instead.

Line: 1355 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">23224<..." Line: 1373 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">21025<..." Line: 1391 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">14378<..." Line: 1409 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">10988<..." Line: 1427 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">4300</..." Line: 1445 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">22998<..." Line: 1467 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">5962</..." Line: 1485 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">2929</..." Line: 1503 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">2570</..." Line: 1521 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">3321</..." Line: 1539 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">1484</..." Line: 1557 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">2044</..." Line: 1579 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">2180</..." Line: 1597 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">254</f..." Line: 1615 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">171</f..." Line: 1633 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">198</f..." Line: 1651 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">231</f..." Line: 1669 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">75</fo..." Line: 1692 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">986</f..." Line: 1710 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">451</f..." Line: 1728 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">374</f..." Line: 1746 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">612</f..." Line: 1764 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">224</f..." Line: 1782 Column: 34 - 55
"...xt3">群组成员：<font color="#007eff">206</f..."

Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Line: 2058 Column: 1 - 7
"... </div> <style> .go_t..." Line: 2213 Column: 2 - 8
".../script> <style> /*轮播..."

Warnings

This document appears to be written in Simplified Chinese. Consider adding “lang="zh-hans"” (or variant) to the “html” start tag.

Line: 2 Column: 122 - 43
"...onal.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head..."

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icourses.cn Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.

icourses.cn TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

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priority - 57Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 554.8KiB (31% reduction).

priority - 13Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 9Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 84.5KiB (81% reduction).

priority - 3Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 30.1KiB (35% reduction).

priority - 2Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking CSS resources. This causes a delay in rendering your page.

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priority - 83Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 807KiB (64% reduction).

priority - 72Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 6 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

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Optimize CSS Delivery of the following:

priority - 15Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

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priority - 10Avoid landing page redirects

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priority - 2Minify JavaScript

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priority - 0Minify CSS

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priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

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priority - 37Use legible font sizes

The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

priority - 10Configure the viewport

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priority - 3Size tap targets appropriately

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icourses.cn HTML validation

Errors

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)

Bad value “” for attribute “name” on element “input”: Must not be empty.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Bad value “960px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.

Bad value “300px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

No space between attributes.

Stray end tag “img”.

Bad value “320px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.

Bad value “140px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

Bad value “130px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.

Bad value “80px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

The “font” element is obsolete. Use CSS instead.

Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Warnings