JS判断显示器分辨率，调用对应CSS/JS代码

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if (window.navigator.userAgent.indexOf("MSIE")>=1) 
{ 
  var IE1024=""; 
  var IE800=""; 
  var IE1920=""; 
  var IEother=""; 
  ScreenWidth(IE1024,IE800,IE1152,IEother) 
}else{ 
  if (window.navigator.userAgent.indexOf("Firefox")>=1) 
  { 
    //如果浏览器为Firefox 
    var 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; 
} 


if ((screen.width < 1024) && (screen.height < 768)) 
{ 
  document.write("<link rel='stylesheet' type='text/css' href='template/sunflower/styles_only.css' />") 
} 
else 
{ 
  document.write("<link rel='stylesheet' type='text/css' href='template/sunflower/styles_tri.css' />") 
}