function lib_bwcheck(){
	this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0;
	this.ie4=(document.all && !this.dom)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6
	this.macsafari=(this.agent.indexOf("Mac")>-1 && this.ver.indexOf("Safari")>-1)
	this.macmozilla=(this.agent.indexOf("Mac")>-1 && this.ver.indexOf("mozilla")>-1)
	this.macfirefox=(this.agent.indexOf("Firefox")>-1 && this.ver.indexOf("Macintosh")>-1)
	this.macie=(this.agent.indexOf("MSIE")>-1 && this.ver.indexOf("Macintosh")>-1)
	this.mac=this.agent.indexOf("Mac")>-1
	this.firefox=this.agent.indexOf("Firefox")>-1
	this.opera5=this.agent.indexOf("Opera")>-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)
	this.compatiblefckaditor=(this.ie6 || this.macfirefox || this.firefox)
	return this
}
//alert (navigator.userAgent +' <-> '+ navigator.appVersion);
//Uncomment the next line if you want the user to be sent to another page if he's using an old browser
//if(!bw.bw) location.href='sorry.html'