function popWindow() {
}

function OpenWin(valfile,valname,valwidth,valheight,status,tool,scrbar,resize) {

window.name="Popper"; // To reference opening window.

var w = 480, h = 340;

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

var popW = valwidth, popH = valheight;

var leftPos = (w-popW)/2, topPos = (h-popH)/2;

window.open(valfile,valname,'width=' + popW + ',height=' + popH + ',top=' + topPos + ',left=' + leftPos + ',menubar=no,status=' + status + ',toolbar=' + tool + ',scrollbars=' + scrbar + ',resizable=' + resize);
return true;
}