function popUp(url,target)
{
	var windowWidth = window.screen.width;
    var windowHeight= window.screen.height / 2;
	var centerWidth = (window.screen.width - windowWidth) / 2;
    var centerHeight = windowHeight;
	newWindow = window.open(url, target, "width="+ windowWidth +",height="+ windowHeight +",toolbar=no,menubar=No,scrollbars=Yes,location=No,left="+centerWidth+",top="+centerHeight);
	newWindow.focus();
	void(0);
}