var br;
function getBrowserType() { 
    this.ver=navigator.appVersion 
    this.dom=document.getElementById?1:0 
    this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0; 
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
    this.ie4=(document.all && !this.dom)?1:0; 
    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.name=this.ns4?'ns4':this.ns6?'ns6':this.ie4?'ie4':this.ie5?'ie5':this.ie6?'ie6':'x';
    return this 
} 
br=new getBrowserType();