var bw_debug=false;
function verifyCompatibleBrowser(){ 
    this.ver=navigator.appVersion 
    this.dom=document.getElementById?1:0 
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
    this.ie4=(document.all && !this.dom)?1:0; 
    this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
    this.ns4=(document.layers && !this.dom)?1:0; 
    this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5);
    return this;
} 
var bw=new verifyCompatibleBrowser();
if(bw_debug){
	s='';
	s=s+'ver '+bw.ver+'\n';
	s=s+'dom '+bw.dom+'\n';
	s=s+'ie5 '+bw.ie5+'\n';
	s=s+'ie4 '+bw.ie4+'\n';
	s=s+'ns5 '+bw.ns5+'\n';
	s=s+'ns4 '+bw.ns4+'\n';
	s=s+'bw  '+bw.bw+'\n';
	alert('verifyCompatibleBrowser()\n'+s);
}