Question

How can i validate content of a input box? that when a user for example write in that inbox http://www.example.com input box turn it into www.example.com .in other words its valide frist http and if its exist remove it automatically and insert the correct and show the correct in that input-box ?

Answer 1

A one liner:

$('input').keyup(function(){ $(this).val() === 'http://' && $(this).val(''); });

Or:

$('#validate').click(function(){ 
  var i = $('input');
  (/http:\/\//).test(i.val()) && i.val(i.val().replace('http://',''));
});