function panels_switch_to(panels_id,panel_id,switch_id,form_id) {
	var x=document.getElementById(panels_id);
	if(!x) return;
	var list=x.getElementsByTagName("DIV");
	for(var i=0;i<list.length;i++) {
		var e=list[i];
		var t=document.getElementById("tab_"+e.id);
		if(t != null) {
			if(e.id==panel_id) {
				e.style.display="block";
				t.className="selected";
			} else {
				e.style.display="none";
				t.className="unselected";
			}
		}
	}
	if(form_id) {
		document.form.elements[switch_id].value=panel_id;
	} else {
		
	}
}