function IsIE8Browser() {
	var rv = -1;
	var ua = navigator.userAgent;
	var re = new RegExp("Trident\/([0-9]{1,}[\.0-9]{0,})");
	if (re.exec(ua) != null) { rv = parseFloat(RegExp.$1); }
	return (rv >= 4);
}

function isIE(){
	if(navigator.appName == 'Microsoft Internet Explorer'){
		return true;
	}
	else{
		return false;
	}
	var ver = navigator.appVersion;
	var ver_int = parseInt(navigator.appVersion);

	alert("name:"+name + ", ver:"+ver + ", ver_int:"+ver_int);
}

function GetBrowserVersion() {
	var rv = -1;
	if (isIE()) {

		var ua = navigator.userAgent;
		var re = /MSIE ([0-9]{1,}[\.0-9]{0,})/g;

		while ((foundArr = re.exec(ua)) != null) {
			rv = (rv > foundArr[1] ? rv : foundArr[1]);
		}
	} 
	return rv;
} 

function open_popup_ie_upgrade(version,wid,hei,tops,lefts){	
	var win;
	win=window.open("/pop/pop_ie_upgrade.php?version="+version,"ie_upgrade_popup","top="+tops+",left="+lefts+",width="+wid+",height="+hei+",scrollbars=no");
	try{ win.focus(); }catch(e){}
}