function verifyCompatibleBrowser() {
		this.ver=navigator.appVersion
		this.agent=navigator.userAgent
		this.dom=document.getElementById?1:0
		this.opera5=this.agent.indexOf("Opera 5")>-1
		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.ie4=(document.all && !this.dom && !this.opera5)?1:0;
		this.ie=this.ie4||this.ie5||this.ie6
		this.mac=this.agent.indexOf("Mac")>-1
		this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0;
		this.ns4=(document.layers && !this.dom)?1:0;
		this.bw=(this.ie6||this.ie5||this.ie4||this.ns4||this.ns6||this.opera5)
		return this
	}

	function CheckDocSize() {
		//Opera, Netscape 6, Netscape 4x Mozilla 
		if (window.innerWidth || window.innerHeight) {
			docwidth = window.innerWidth;
			docheight = window.innerHeight;
		} 
		//IE Mozilla 
		if (document.body.clientWidth || document.body.clientHeight) {
			docwidth = document.body.clientWidth;
			docheight = document.body.clientHeight;
		}
	}
	
	bw = new verifyCompatibleBrowser();
	var NS=(document.layers);
	var docwidth;
	var docheight;