function open_win(URL, windowName, popW, popH, scrollbarFlag, menubarFlag, toolbarFlag, resizeFlag) {

var w = 1024, h = 768;

if (document.all || document.layers) {
   w = screen.availWidth;
   h = screen.availHeight;
}

var topPos = (h-popH-100), leftPos = (w-popW-100);


   window.open(URL,''+ windowName +'','width=' + popW + ',height=' + popH + ',scrollbars='+ scrollbarFlag +', menubar='+ menubarFlag +', toolbar='+ toolbarFlag +', '+ resizeFlag +', left=' + leftPos + ',top=' + topPos);
}