function setlanguage(str){
   var ls = location.search;
   var lh = location.href; 
   var ind=lh.indexOf(".cfm");
   var cfm = '';
   if(ind==-1){cfm='index.cfm?'}
	if(ls==''){ls=cfm+''};
	    var index=ls.indexOf("lang=");
        var pos=index+5;
        var car1=ls.charAt(pos);
		var car2=ls.charAt(pos+1);
		var car = car1+car2;
	 if (index==-1){//geen lang= in url
	  location.search=ls+"&lang="+str;
     }else{
      car="="+car;
      str="="+str;
      location.search=ls.replace(car,str) ;
	 }	
}