function browsercheck() { 

	this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0

	this.opera5=(navigator.userAgent.indexOf("Opera")>-1 && document.getElementById)?1:0

	this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; 
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6;

	this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
	this.ns4=(document.layers && !this.dom)?1:0;
	this.ns=this.ns4||this.ns6;

	this.mac=this.agent.indexOf("Mac")>-1;
	this.win=this.agent.indexOf("Windows")>-1;

	this.gen4=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5);

	return this;

}

browser = new browsercheck();