function val2(){
	var coffee=document.forms[0].val;
	var txt="?tag=";
	var i;
	for (i=0;i<coffee.length;i++){
		if (coffee[i].checked){
			txt=txt + coffee[i].value + ",";
		}
	}
	var adress = txt.substring(0, txt.length-1);
	this.location = adress;

}