//browsers 
  var ie,ns,opera,other,mac,pc,otherSystem; 
  var browName = (navigator.appName);
  var systemName = (parseFloat(navigator.appVersion));
  var LayerOpen=0; 
  var LayerTop,LayerLeft;
 //Checks witch browser 
  if(browName=='Microsoft Internet Explorer'){
    ie = 1;
  }else if(browName=='Netscape') {
    ns = 1;
  }else if(browName=='Opera'){
    other = 1;
  }
  if((navigator.appVersion.indexOf("Win") != -1)){
  	win = 1;
  }else if((navigator.appVersion.indexOf("Mac") != -1)){
  	mac = 1;
  }else{
  	otherSystem = 1;
  }


if(ns) {
  if(mac) {
    document.write('<link rel="STYLESHEET" type="text/css" href="css/macns.css">');
  } else {
    document.write('<link rel="STYLESHEET" type="text/css" href="css/pcns.css">');
  }
} else {
  if(mac) {
    document.write('<link rel="STYLESHEET" type="text/css" href="css/macie.css">');
  } else {
    document.write('<link rel="STYLESHEET" type="text/css" href="css/pcie.css">');
  }
}