function PopupCalendar()
{
        alert("a");
       //window.open("../Controls/PopupCalendar.aspx", "calendar", "menubar=false,width=200,height=100");
}

function PopupWindow(url, width, height, position)
{
	var top = (screen.height / 2) - (height/2);
    var left = (screen.width / 2) - (width/2);
  
    if (position == "center")
    {
		// resizable
		window.open(url, "","menubar=false,scrollbars=1,width=" + width + ",height=" + height + ",top=" + top + ",left=" + left);
	}
}