function popWin(url,width,height,posx,posy) {
var myWindow = window.open(url, "mainWin", 'resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,width='+width+',height='+height+',screenX='+posx+',screenY='+posy+',left='+posx+',top='+posy+'');
myWindow.focus()
}