if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ieversion>=8 || ieversion>=7)
  document.write('<link rel="stylesheet" href="lr_ie8.css" type="text/css">')
 else if (ieversion >=6 || ieversion>=5)
  document.write('<link rel="stylesheet" href="lr_ie.css" type="text/css">')

}
//else if ((navigator.appName).indexOf("Microsoft")!=-1) {
  //document.write('<link rel="stylesheet" href="edudepot_ie.css" type="text/css">');
//}
else{
  document.write('<link rel="stylesheet" href="lr.css" type="text/css">');
}