给动态生成的html元素添加验证事件（基于jquery的验证组件）

找到需要绑定的元素，用add添加验证事件

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" }
});
}