javascript判断浏览器分辩率

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javascript判断浏览器分辩率代码：

<script type="text/javascript">
<!--
alert(window.screen.width+" "+window.screen.height);
-->
</script>

如：华为：mate 40为宽360px，高为792px 微信浏览器里面为：400px 880px

<SCRIPT LANGUAGE="JavaScript"><!--if (window.navigator.userAgent.indexOf("MSIE")>=1){//如果浏览器为IEsetActiveStyleSheet("default.css");}else{if (window.navigator.userAgent.indexOf("Firefox")>=1){//如果浏览器为FirefoxsetActiveStyleSheet("default2.css");}else{//如果浏览器为其他setActiveStyleSheet("newsky.css");}}function setActiveStyleSheet(title){ document.getElementsByTagName("link")[0].href="style/"+title; }//--></SCRIPT>

<SCRIPT LANGUAGE="JavaScript"><!--if (window.navigator.userAgent.indexOf("MSIE")>=1){var IE1024="";var IE800="";var IE1152="";var IEother="";ScreenWidth(IE1024,IE800,IE1152,IEother)}else{if (window.navigator.userAgent.indexOf("Firefox")>=1){//如果浏览器为Firefoxvar Firefox1024="";var Firefox800="";var Firefox1152="";var Firefoxother="";ScreenWidth(Firefox1024,Firefox800,Firefox1152,Firefoxother)}else{//如果浏览器为其他var Other1024="";var Other800="";var Other1152="";var Otherother="";ScreenWidth(Other1024,Other800,Other1152,Otherother)}}function ScreenWidth(CSS1,CSS2,CSS3,CSS4){if ((screen.width == 1024) && (screen.height == 768)){setActiveStyleSheet(CSS1);}else{if ((screen.width == 800) && (screen.height == 600)){setActiveStyleSheet(CSS2);}else{if ((screen.width == 1152) && (screen.height == 864)){setActiveStyleSheet(CSS3);}else{setActiveStyleSheet(CSS4);}}}}function setActiveStyleSheet(title){ document.getElementsByTagName("link")[0].href="style/"+title; }//--></SCRIPT>

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