給動態生成的html元素添加驗證事件（基於jquery的驗證組件）

找到需要綁定的元素，用add添加驗證事件

elementId = "#xxxxxxxxx_" + rowID;
if ($(elementId).rules().required == undefined) {
if (!$(elementId).hasClass("ui-disabled")) {
$(elementId).rules("add",
{
required: true,
maxlength: 2000,
messages: { required: "Please enter a description", maxlength: "Description cannot be longer than 2000 characters" }
});
}