/*** Send Colleague Inivtation - STARTS ***/
function colleagueInvitation(form_obj)
{
	var message = $("#message_box_colleague").val();

	// first hide any error messages
	$('.error').hide();
	$('.common_error').html('');
	
	var selected_items = $("#colleague_selected_email_container div").size()
	// Form Validations 
	if(selected_items==0)
	{
	  $(".common_error").html('Select atleast one Colleague');		  			  
	  $("#selected_emails:tr first").focus();
	}
	else if(message == "") {
	  $("label#message_box_colleague_error").show();
	  $("label#message_box_colleague_error").html('This field is Required');		  			  
	  $("#message_box_colleague").focus();
	  return false;
	}
	else
	{ 				
		var str = $("#"+form_obj.id).serialize();
		$("#tab4_sub_div2").hide();		
		$("#temp_loader").show();	
		$.ajax
		({
		   type: "POST",
			url: "community/send_invitation.php",
			data: str,
			success: function(msg)
			{
				$("#temp_loader").hide();				
				$("#tab4_div").show();	
				
				$("#tab4_webmail_notice").css('display','block');						
				$("#tab4_webmail_notice").html(msg);		
				$("#tab4_webmail_notice").fadeIn('slow')
				.animate({opacity: 1.0}, 3000)
				.fadeOut('slow', function() {
					$("#tab4_webmail_notice").slideUp();
				});						
			}
		});
	}
}
/* ----- ENDS ----- */
/* ----- HTML PART ----- */

					<br clear="all"/><p><label class="error" for="attach_link_url" id="attach_link_url_error" style="display:none; color:red; font-weight:normal;"></label></p>

JQuery AJAX with Validation - Scripts

JavaScript