function validate(form_id,email,error_msg) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
      alert(error_msg);
      return false;
   }
}

$(document).ready(function() {						
	$('#btn_submit_search').click(function() {
		$("#form_search").submit();				
	});
});