function opn(URL,winname,w,h){
w=w+20;
h=h+20;
	window.open('','newwin','toolbar=0,status=0,location=0,menubar=0,scrollbars=1,resizable=1,width=' + w + ',height=' + h);
	document.f1.target = "newwin";
	document.f1.filename.value = URL;
	document.f1.wintitle.value = winname;
	document.f1.submit();
}