var win=null;
function displayWin(url)
{
if(win !=null) win.close();
var width=parseInt(screen.width *0.80);
var height=parseInt(screen.height *0.70);
LeftPosition = (screen.width) ? (screen.width-width)/2 : 0;
TopPosition = (screen.height) ? (screen.height-height)/2 : 0;
settings ='top='+TopPosition+',backgroundcolor=#ff0000,left='+LeftPosition+',scrollbars=0,topmargin=0,leftmargin=0,width='+width+',height='+height
win= window.open('', '', settings);
win.document.write("");
win.document.write('');
win.document.close();
}
