function browserCheck(){
	this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0
	this.opera6=((this.agent.indexOf("Opera 6")>-1) && this.dom)?1:0;
	this.ie5=((this.ver.indexOf("MSIE 5")>-1) && this.dom && !this.opera6)?1:0; 
	this.ie6r=((this.ver.indexOf("MSIE 6")>-1 || this.ver.indexOf("MSIE 7")>-1) && this.dom && (document.compatMode == "BackCompat"))?1:0;
	this.ie6s=((this.ver.indexOf("MSIE 6")>-1 || this.ver.indexOf("MSIE 7")>-1) && this.dom && (document.compatMode == "CSS1Compat"))?1:0;
	this.ie4=(document.all && !this.dom)?1:0;
	this.ie=(this.ie4||this.ie5||this.ie6r||this.ie6s)?1:0;
	this.mac=(this.agent.indexOf("Mac")>-1)?1:0;
	this.ns6=(this.dom && (parseInt(this.ver) >= 5)) ?1:0; 
	this.ns4=(document.layers && !this.dom)?1:0;
	this.ns=(this.ns4||this.ns6)?1:0;
	this.bw5=(this.ie5||this.ie6r)?1:0;
	this.bw6=(this.ie6s||this.ns6||this.opera6)?1:0;
	this.bw=(this.ie6r||this.ie6s||this.ie5||this.ns6||this.opera6)?1:0;
	return this;
}