function popup(url){
    var width = 300;
    var height = 200;
    var left = 300;
    var top = 200;        	
    var locWindow = window.open(url, "credits", "directories = no,width = " + width + "px,height = " + height + "px,top = " + top + "px,left = " + left + "px,location = no, menubar = no,status = no,toolbar = no,resizable = yes");
    locWindow.focus();
}