function popup(options) {
	var settings = {
    url: '#',
    width: 600,
    height: 500,
    name:"_blank",
    location:"no",
    menubar:"no",
    toolbar:"no",
    status:"yes",
    scrollbars:"yes",
    resizable:"yes",
    left:"",
    top:"",
    normal:false
  };

	for(var x in options) {
		settings[x] = options[x];
	}

  var opensettings = 'width='+settings.width+',height='+settings.height+',location='+settings.location+',menubar='+settings.menubar+',toolbar='+settings.toolbar+',scrollbars='+settings.scrollbars+',resizable='+settings.resizable+',status='+settings.status

  if (settings.top!="")opensettings+=",top="+settings.top;
  if (settings.left!="")opensettings+=",left="+settings.left;

  if(!window.open(settings.url, settings.name, opensettings))
  	alert("Your system has blocked an important popup");

  return false;
}