jQuery: trying to get the input value

i'm trying to obtain an input va开发者_StackOverflow社区lue with this:

var $a = ('#telephone_number').val();

alert($a);

But nothing, any idea?

telephone_number is the id of the input.

Regards

Javi

use this

var $a = jQuery('#telephone_number').val();

OR

var $a = $('#telephone_number').val();

   var $a = $('#telephone_number').val();

    alert($a);

currently you are not passing the div id to jQuery, u are just doing (#tel_no) this is wrong.