version=0;
if (navigator.appVersion.indexOf("MSIE")!=-1) {
  temp=navigator.appVersion.split("MSIE");
  version=parseFloat(temp[1]);
}
if (version<5.0 && version>0 || !navigator.platform.toLowerCase().match(/win/)) { //NON IE browser will return 0
  if(!document.cookie.match(/IncompatibleBrowser/)) {
    SetBrowserCookie('false');      
  } else {
    ReadBrowserCookie();
  }
}

function SetBrowserCookie(v, e) {  
  if(e == "del") {
    var date = new Date();
    gDate = date.toGMTString();
    document.cookie = "IncompatibleBrowser=" + v + ";expires=" + gDate + ";";    
  } 
  document.cookie = "IncompatibleBrowser=" + v + ";";
  if(v == "false") {
    alert("Warning: you are using an unsupported browser. This site requires at least Internet Explorer 5.0 or a Mozilla based browser, on a Windows platform.");
  }  
}

function ReadBrowserCookie() {
  var cookieArray = document.cookie.split(";");
  for(i=0;i<cookieArray.length;i++) {
    if(cookieArray[i].match(/IncompatibleBrowser/)) {
      var cookieVal = cookieArray[i].substring(cookieArray[i].indexOf("=") + 1, cookieArray[i].length);
    }
  }
  if(cookieVal == "false") {    
    SetBrowserCookie('true','del');
    SetBrowserCookie('true');
  } 
}