根据分辨率不同调用不同的css文件

<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) 　　{ 　　file://如果浏览器为Firefox 　　var Firefox1024=""; 　　var Firefox800=""; 　　var Firefox1152=""; 　　var Firefoxother=""; 　　ScreenWidth(Firefox1024,Firefox800,Firefox1152,Firefoxother) 　　}else{ 　　file://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;  　　} 　　file://--> 　　</SCRIPT>