var ww = 0;

function pop(filename,wname)
{
	if(ww == 1){if(!popwin.closed){popwin.close();}}
	else         {ww=1;}
	popwin = window.open(filename,wname,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,titlebar=no,width=700,height=450,");
}