function popup(url,width,height,name) 
{
	var left   = (screen.width  - width)/2;
	var top    = (screen.height - height)/2;
	var params = 'width='+width+', height='+height+', top='+top+', left='+left+', directories=no, location=no, menubar=no, resizable=yes, scrollbars=yes, status=yes, toolbar=no';
	newwin=window.open(url,name, params);
	if (window.focus) {newwin.focus()}
	//return false;
}