var newwindow;
function logwin(url,name,winHeight,winWidth)
{
	cen1 = (screen.width - winWidth)/2;
	cen2 = (screen.height - winHeight)/2;
	newwindow=window.open(url,name,'height='+winHeight+',width='+winWidth+',left='+cen1+',top='+cen2);
	newwindow.moveTo(cen1,cen2);
	if (window.focus) {newwindow.focus()}
}