//***************************************
    //  © 2009 Koordinauten Gbr
    //***************************************

     function chk_bw(){
      	this.ver=navigator.appVersion
      	this.dom=document.getElementById?1:0
        this.ie8=(this.ver.indexOf("MSIE 8")>-1 && this.dom)?1:0;
        this.ie7=(this.ver.indexOf("MSIE 7")>-1 && this.dom)?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.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
      	this.ns4=(document.layers && !this.dom)?1:0;
      	this.bw=(this.ie7 || this.ie6 || this.ie4 || this.ns4 || this.ns5)
       	return this
    }