OnSelectStart doesn't work on Firefox

Question

I have this code:

<div id="menu_blue" onSelectStart="show_and_hide()">
  ...
</div>
<div id="menu_red">
  ...
</div>

<script>
function show_and_hide()
{
    $("#menu_red").slideToggle("slow");
}
</script>

and my firefox version 38.0.5 doesn't want to do anything. I know it could be replaced by OnClick="" but I want to know why firefox does't support this function. Does anybody know? Thank you.

Answer 1

Rather than using doing your click event handlers in HTML it is better to bind them on the document ready or load.

$(document).on("ready",function(){
 $("#menuBttn").on("click",function(event){

  })
})

Also you might find this useful, http://help.dottoro.com/ljwdpnva.php