function AppendQuerystring(){
	var Keys=new Array();
	for (i=0;i<arguments.length;i++){
		Keys[i]=arguments[i].substring(0,arguments[i].indexOf('=')-1);
	}
	var Queries = new Array()
	Queries = document.location.search.substring(1).split('&')
	var ExtraQuery='';
	var DoAdd;
	for(i=0;i<Queries.length;i++){
		DoAdd=true;
		if (Queries[i]=='' || Queries[i].toLowerCase().indexOf('priority')==0 || Queries[i].toLowerCase().indexOf('iid')==0)DoAdd=false;
		for(k=0;k<Keys.length;k++)
			if (Queries[i].indexOf(Keys[k])==0)DoAdd=false;
		if (DoAdd) ExtraQuery =  ExtraQuery + '&' + Queries[i]
	}
	var Querystring='';
	for(i=0;i<arguments.length;i++)
		Querystring = Querystring + (i==0 ? "?" : "&") + arguments[i];
	document.location=document.location.pathname + Querystring + ExtraQuery;
}