Sometimes you might need to add messages to Validation summary. Here is a small javascript function that will help you do that. The method can be called onClick event of a button.
function performValidation() { if ($("#notestext").val() == "") { var ul = $("#validationSummary ul"); ul.html(""); ul.append("<li>" + "Action Note must be entered." + "</li>"); return false; } return true; }
Hope it helps