function BrowserCheck()
{
	var b = navigator.appName
	if (b=="Netscape") 
		this.b = "ns"
	else if (b=="Microsoft Internet Explorer") 
		this.b = "ie"
	else 
		this.b = "ie";

	this.v = parseInt(navigator.appVersion)
	this.ns = (this.b=="ns" && this.v==4)
	this.ns4 = (this.b=="ns" && this.v==4)
	this.ie = ((this.b=="ie" && this.v>=4) || (this.b=="ns" && this.v>=5))
	this.ie4 = (navigator.userAgent.indexOf('MSIE 4')>0)
	this.ie5 = (navigator.userAgent.indexOf('MSIE 5')>0)
	if (this.ie5) 
		this.v = 5
	
	if(!this.ns) 
		this.ie=true;
}

is = new BrowserCheck()