被阻止并允许时弹出警报触发器

Question

I have this code to trigger a alert if some one blocks pop ups from my site:

var w = window.open( "url","_blank", "height = 200, width = 300, top=450, left=1025" );
if(w == null || typeof(w) == "undefined" || w.location.href == 'about:blank') {
   alert("Please enabled popups for this site to continue.");  
}

Problem is that the alert shows if i block or allow pop ups. Why does it keep getting triggered?

Many thanks

Answer 1

Instead of a pop up window I would recommend using a javascript modal pop up instead. Modal pop up windows will not be blocked and are not as intrusive as a pop up window.

Here is a demo:

• http://www.jacklmoore.com/demo/modal/modal2.html
• http://www.jacklmoore.com/colorbox/example1/
  • Outside HTML (Ajax) would be the best example for you. Have a look at the source code to see how to call this if this is what you want.

There are many options for this. Here are a couple jquery options:

• http://www.jacklmoore.com/colorbox
• http://jqueryui.com/dialog/#modal