The safari has a pop-up blocker silencer not show when a link is blocked.
To check if the pop-up blocker is active, go on safari settings > security > something like blocking pop-ups.
To cross it in a simple way, since I can not open a new window, I display an alert showing pop-up blocked.
In my case, I use select inputs to open external links:
HTML
<select id="retailer" class="windowOpen retailer-submenu">
<option value="null">Select one</option>
<option value="http://amazon.com">Amazon</option>
<option value="http://ebay.com">eBay</option>
</select>
Javascript
<script type='text/javascript'>
$('select.windowOpen').change(function(){
var url = $(this).val();
var open = window.open(url);
if (open == null || typeof(open)=='undefined')
alert("Turn off your pop-up blocker!\n\nWe try to open the following url:\n"+url);
});
</script>
The code to check if a pop-up is blocked is just this:
var open = window.open('http://google.com');
if (open == null || typeof(open)=='undefined')
alert("Turn off your pop-up blocker!");
PS: the jquery trigger did not work with me.