Simple Problem !

Simple Problem !

Hello Everyone,
Well i am facing maybe a conflict on my plugins javascript file, i am trying to fix it for the last 3 days with no luck, i googled a lot but again no luck, i am not a jquery expert and i need help with the following code :
Logic --->validate inputs and if anything wrong fade error message, put a red border a round the wrong field and prevent the whole process, i made it work before with less plugins, any ideas ?
Note: I bolded and colored my not working function in red

  1. $(function(){
            $('#contactsubmit').ajaxForm({
            beforeSubmit: validateContact,
            target: '#notification',
            success: function() {
            $('#notification').fadeIn('slow');}});
    });





Check the attached file for the full code, Thanks in Advance !