function BrowserPruefen(){

	this.ver=navigator.appVersion;

	this.dom=document.getElementById?1:0;

	this.mac=(this.ver.indexOf("Mac")>-1)?1:0;

	this.ie5mac=(this.mac && this.ver.indexOf("5.0")>-1 && this.ver.indexOf("MSIE")>-1)?1:0

	this.ie4mac=(this.mac && this.ver.indexOf("4.5")>-1 && this.ver.indexOf("MSIE")>-1)?1:0	

	this.ie=(this.ver.indexOf("MSIE")>-1)?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.browser=(this.ie5||this.ie4||this.ns4||this.ns5);

	return this;

}

var browser=new BrowserPruefen();