function pt(){
var browser= navigator.appName;
var b_version= navigator.appVersion;
var version= parseFloat(b_version);




if (navigator.userAgent.indexOf('Safari') != -1) {
	document.write('<link rel="stylesheet" type="text/css" href="safaricss.css"  media="screen"/>')
}

if(navigator.appName == "Microsoft Internet Explorer")
{
	document.write('<link rel="stylesheet" type="text/css" href="iecss.css"  media="screen"/>')

}



if (navigator.userAgent.indexOf('Firefox') !=-1){
	document.write('<link rel="stylesheet" type="text/css" href="firefoxcss.css"  media="screen"/>')
}



}