Question

I am including a jQuery file like this:

<script type="text/javascript" src="jquery-1.8.0.min.js"></script>

I am having a code like this:

if($.isNumeric(now))
{            
  alert("yes");
}
else
{
  alert("no");
}

But when I run this script get an error:

$.isNumeric is not a function

What do I need to do?

Answer 1

Wrap your code in $(document).ready(function () { //your code goes here... }); Please refer to jQuery.ready() for more details.

Alternatively, you can simply place your code before the </body>.

Also, you might want to try to replace $ with jQuery and see if there’d be any conflicts in you javascript, e.g. jQuery.isNumeric("-10");

If it does turn out to be conflicts, you can add this line of code, jQuery.noConflict(); at the beginning of your jQuery code. Please refer to jQuery.noConflict() for more details.

Check this post on Stackoverflow which might also be helpful to you.