在功能稍强一些的商城系统(比如淘宝)中，发布商品时都会有类似“商品扩展属性”的选项(即：商品属性除共用的属性比如“名称”，“价格”之外，还会有一些属性会根据商品所在类别做一些动态调整，比如电脑类的商品会出现“内存”、“CPU速率”、“硬盘容量”等，而服装类的商品会出现“尺码”、“面料”等，我把这些动态调整的属性称之为“扩展属性”)
通常这些扩展属性的定义，我们可以用服务端语言动态以js数组的方式输出到页面的html源代码中，前台再用js读取数组动态生成相应的录入项，同时表单提交时还要对这些扩展属性的输入项做一些客户端的验证：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="http://ajax.microsoft.com/ajax/jQuery/jquery-1.4.2.min.js"></script>
</head>
<body>
<table>
<tr>
<td align="right">
产品名称：
</td>
<td>
<input type="text" name="1" />
</td>
</tr>
<tbody id="tbodyAppend">
</tbody>
<tr>
<td>
</td>
<td>
<input type="button" value="验证输入" id="btnCheck" name="btnCheck" />
</td>
</tr>
</table>
<script type="text/javascript">
//扩展属性定义(实际开发中通常从后台输出 或 利用ajax异步加载)
var _data = { "Head": [
{ "F_DisplayName": "品牌", "F_FieldName": "PinPai", "F_ValueType": "字符串", "F_ValueLength": "50", "F_InputType": "单选框", "F_DefaultValue": "康师傅|统一|其它,KangShiFu|TongYi|Others,TongYi", "F_IsRequired": "1" },
{ "F_DisplayName": "保质期", "F_FieldName": "BaoZhiQi", "F_ValueType": "整数", "F_ValueLength": "4", "F_InputType": "文本框", "F_DefaultValue": "12", "F_IsRequired": "0" },
{ "F_DisplayName": "产品描述", "F_FieldName": "MiaoShu", "F_ValueType": "字符串", "F_ValueLength": "20", "F_InputType": "文本域", "F_DefaultValue": "请输入详细描述", "F_IsRequired": "1" },
{ "F_DisplayName": "食用方式", "F_FieldName": "ShiYong", "F_ValueType": "字符串", "F_ValueLength": "50", "F_InputType": "复选框", "F_DefaultValue": "开袋即食|加热|冰冻|其它,开袋即食|加热|冰冻|其它,加热|其它", "F_IsRequired": "1" },
{ "F_DisplayName": "可选颜色", "F_FieldName": "Color", "F_ValueType": "字符串", "F_ValueLength": "50", "F_InputType": "下拉框", "F_DefaultValue": "红色|蓝色,Red|Blue,Blue", "F_IsRequired": "1" },
{ "F_DisplayName": "是否包邮", "F_FieldName": "BaoYou", "F_ValueType": "逻辑型", "F_ValueLength": "1", "F_InputType": "文本框", "F_DefaultValue": "", "F_IsRequired": "1" },
{ "F_DisplayName": "重量", "F_FieldName": "Weight", "F_ValueType": "浮点数", "F_ValueLength": "10", "F_InputType": "文本框", "F_DefaultValue": "", "F_IsRequired": "0" },
{ "F_DisplayName": "出厂日期", "F_FieldName": "CreateDate", "F_ValueType": "日期", "F_ValueLength": "50", "F_InputType": "文本框", "F_DefaultValue": "", "F_IsRequired": "1" }
]
}
var _append = $("#tbodyAppend");
var _html = "";
for (var i = 0; i < _data.Head.length; i++) {
var _displayName = _data.Head[i].F_DisplayName;
var _fieldName = _data.Head[i].F_FieldName;
var _valueType = _data.Head[i].F_ValueType;
var _valueLength = _data.Head[i].F_ValueLength;
var _inputType = _data.Head[i].F_InputType;
var _defaultValue = _data.Head[i].F_DefaultValue;
var _isRequire = _data.Head[i].F_IsRequired;
var _dvArr, _arrDisplay, _arrDisplay, j, _dv, _dvArr2, k;
_html += "<tr><td align='right'>" + (_isRequire == "1" ? "<span style='color:red'>(*)</span>" : "") + _displayName + "：</td><td align='left'>";
switch (_data.Head[i].F_InputType) {
case "单选框":
_dvArr = _defaultValue.split(',');
if (_dvArr.length < 2) {
alert("单选框[" + _displayName + "]默认值设置有误，请联系管理员!");
break;
}
_arrDisplay = _dvArr[0].split('|');
_arrValue = _dvArr[1].split('|');
if (_arrDisplay.length != _arrValue.length) {
alert("单选框[" + _displayName + "]默认值设置有误，请联系管理员!");
break;
}
if (_dvArr.length == 3) {
_dv = _dvArr[2];
}
for (j = 0; j < _arrDisplay.length; j++) {
_html += "<input type='radio' " + (_dv == _arrValue[j] ? "checked" : "") + " value='" + _arrValue[j] + "' name='" + _fieldName + "' id='" + _fieldName + "_" + j + "' dataType='" + _valueType + "' isRequired='" + _isRequire + "' maxLength='" + _valueLength + "' label='" + _displayName + "' /><label for='" + _fieldName + "_" + j + "'>" + _arrDisplay[j] + "</label>"
}
break;
case "复选框":
_dvArr = _defaultValue.split(',');
if (_dvArr.length < 2) {
alert("复选框[" + _displayName + "]默认值设置有误，请联系管理员!");
break;
}
_arrDisplay = _dvArr[0].split('|');
_arrValue = _dvArr[1].split('|');
if (_arrDisplay.length != _arrValue.length) {
alert("复选框[" + _displayName + "]默认值设置有误，请联系管理员!");
break;
}
if (_dvArr.length == 3) {
_dv = _dvArr[2];
}
_dvArr2 = _dv.split('|');
for (j = 0; j < _arrDisplay.length; j++) {
var _checked = false;
for (k = 0; k < _dvArr2.length; k++) {
if (_dvArr2[k] == _arrValue[j]) {
_checked = true;
}
}
_html += "<input type='checkbox' " + (_checked ? "checked" : "") + " value='" + _arrValue[j] + "' name='" + _fieldName + "' id='" + _fieldName + "_" + j + "' dataType='" + _valueType + "' isRequired='" + _isRequire + "' maxLength='" + _valueLength + "' label='" + _displayName + "'/><label for='" + _fieldName + "_" + j + "'>" + _arrDisplay[j] + "</label>"
}
break;
case "文本框":
_html += "<input type='text' id='" + _fieldName + "' name='" + _fieldName + "' value='" + _defaultValue + "' dataType='" + _valueType + "' isRequired='" + _isRequire + "' maxLength='" + _valueLength + "' label='" + _displayName + "'/>"
break;
case "下拉框":
_dvArr = _defaultValue.split(',');
if (_dvArr.length < 2) {
alert("下拉框[" + _displayName + "]默认值设置有误，请联系管理员!");
break;
}
_arrDisplay = _dvArr[0].split('|');
_arrValue = _dvArr[1].split('|');
if (_arrDisplay.length != _arrValue.length) {
alert("下拉框[" + _displayName + "]默认值设置有误，请联系管理员!");
break;
}
if (_dvArr.length == 3) {
_dv = _dvArr[2];
}
_html += "<select name='" + _fieldName + "' id='" + _fieldName + "' dataType='" + _valueType + "' isRequired='" + _isRequire + "' maxLength='" + _valueLength + "' label='" + _displayName + "'>"
for (j = 0; j < _arrDisplay.length; j++) {
_html += "<option " + (_dv == _arrValue[j] ? "selected" : "") + " value='" + _arrValue[j] + "'>" + _arrDisplay[j] + "</option>";
}
_html += "</select>"
break;
case "文本域":
_html += "<textarea rows='4' cols='60' id='" + _fieldName + "' name='" + _fieldName + "' dataType='" + _valueType + "' isRequired='" + _isRequire + "' maxLength='" + _valueLength + "' label='" + _displayName + "'>" + _defaultValue + "</textarea>"
break;
default:
break;
}
_html += "</td></tr>";
}
_append.html(_html);
//验证函数
$("#btnCheck").click(function () {
var nameArr = [];
var objArr = $("#tbodyAppend [isRequired]");
var i = 0;
objArr.each(function (i) {
var _o = { name: $(this).attr("name"), maxlength: parseInt($(this).attr("maxlength"), 10), label: $(this).attr("label"), type: this.type, tagName: this.tagName, dataType: $(this).attr("dataType"), isRequire: $(this).attr("isRequired") };
if (!indexOfNameArr(nameArr, _o)) {
nameArr.push(_o);
}
})
for (i = 0; i < nameArr.length; i++) {
var obj = nameArr[i];
var _e = document.getElementsByName(obj.name)[0];
var v = _e.value; ;
//单选框,或复选框
if (obj.type == 'radio' || obj.type == 'checkbox') {
if (obj.isRequire == "1") {
v = getGroupValue(obj.name);
if (v == "") {
alert("请选择 [" + obj.label + "] ！");
setGroupfocus(obj.name);
return false;
}
}
}
else if (obj.isRequire == "1")//其它类型：比如文本框，下拉框，文本域
{
if (v == "") {
alert("请输入 [" + obj.label + "] ！");
_e.focus();
return false;
}
}
//检测数据长度
if (obj.maxlength > 0 && v.length > obj.maxlength) {
alert("[" + obj.label + "]的有效数据长度不得超过[" + obj.maxlength + "]个字符");
_e.focus();
return false;
}
//检测数据类型
if (obj.dataType == "日期") {
if (v.length > 0) {
if (!(isDate(v) || isDateTime(v))) {
alert("[" + obj.label + "]为日期/日期时间类型，必须输入有效的日期格式\n\n\t格式：“年-月-日”或“年-月-日 时:分:秒”");
_e.focus();
return false;
}
}
}
else if (obj.dataType == "整数") {
var _intV = parseInt(v, 10);
if (isNaN(_intV)) {
alert("[" + obj.label + "]为整数类型，必须输入整数值");
_e.focus();
return false;
}
else {
_e.value = _intV;
}
}
else if (obj.dataType == "浮点数" || obj.dataType == "货币") {
if (v.length > 0) {
var _floatV = parseFloat(v);
if (isNaN(_floatV)) {
alert("[" + obj.label + "]为数字类型，必须输入有效的数字");
_e.focus();
return false;
}
else {
_e.value = _floatV;
}
}
}
else if (obj.dataType == "逻辑型") {
if (v.length > 0) {
if (!(v == "1" || v == "0")) {
alert("[" + obj.label + "]为逻辑型数据，其值只能为“1”或“0”");
_e.focus();
return false;
}
}
}
}
alert("验证通过!");
return true;
})
//获取某一单选/复选组的值
function getGroupValue(groupName) {
var g = document.getElementsByName(groupName);
var result = "";
for (var k = 0; k < g.length; k++) {
if (g[k].checked) {
result = g[k].value;
break;
}
}
return result;
}
//设置某一单选/复选组焦点
function setGroupfocus(groupName) {
document.getElementsByName(groupName)[0].focus();
}
//辅助函数，用于查找arr中有无o元素
function indexOfNameArr(arr, o) {
var result = false;
for (var i = 0; i < arr.length; i++) {
if (arr[i].name == o.name) {
result = true;
break;
}
}
return result;
}
//检测是否日期格式(格式: 年-月-日)
function isDate(str) {
var reg = /^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))$/
if (reg.test(str)) return true;
return false;
}
//检测是否日期时间格式(格式:年-月-日 时:分:秒)
function isDateTime(str) {
var reg = /^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\s(((0?[0-9])|([1][0-9])|([2][0-4]))\:([0-5]?[0-9])((\s)|(\:([0-5]?[0-9])))))?$/
if (reg.test(str)) return true;
return false;
}
</script>
</body>
</html>
文章转自：http://www.cnblogs.com/yjmyzz/archive/2010/05/16/1736901.html
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