实用的JS表单验证提示效果

更新时间：2009年11月04日 14:45:12 作者：

一个流行且实用的JS表单验证提示，演示了怎么自定义错误信息的显示方式，同时通过写FormValid.showError类方法来实现错误显示方式自定义.

errMsg 是一个错误消息的数组，这样方便自定义,errName是对应错误信息元件名数组，这样可以非富自定义显示方式，FormValid.allName记录了所有有验证规则的字段名数级，在自定义中可以使用到。

<!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> <title>表单验证提示效果</title> <style type="text/css"> body{ color:#666666; font-size:12px} h1{ font-size:20px;} input{ border:#999999 1px solid; background-color:#FFFFEE} .button2{ background-color:#FF9900; border-bottom:#E34A00 2px solid;border-right:#E34A00 2px solid; border-top:#FFB693 2px solid;border-left:#FFB693 2px solid; color:#FFFFFF; font-weight:bold} dl { font:normal 12px/15px Arial; position: relative; width: 350px; } dt { clear: both; float:left; width: 80px; padding: 4px 0 2px 0; text-align: left; } dd { float: left; width: 200px; margin: 0 0 8px 0; padding-left: 6px; } .hint { display: none; position: absolute; right: -160px; width: 200px; margin-top: -4px; border: 1px solid #c93; padding: 10px 12px; background: #ffc url(/upload/2009-11/20091104144511488.gif) no-repeat -10px 5px; } .hint .hint-pointer { position: absolute; left: -10px; top: 5px; width: 10px; height: 19px; background: url(/upload/2009-11/20091104144511488.gif) left top no-repeat; } </style> <script language="JavaScript" type="text/javascript"> var FormValid = function(frm) { this.frm = frm; this.errMsg = new Array();     this.errName = new Array(); this.required = function(inputObj) { if (typeof(inputObj) == "undefined" || inputObj.value.trim() == "") { return false; }         return true; } this.eqaul = function(inputObj, formElements) {         var fstObj = inputObj;         var sndObj = formElements[inputObj.getAttribute('eqaulName')];          if (fstObj != null && sndObj != null) { if (fstObj.value != sndObj.value) { return false; } }         return true; } this.gt = function(inputObj, formElements) {         var fstObj = inputObj;         var sndObj = formElements[inputObj.getAttribute('eqaulName')];          if (fstObj != null && sndObj != null && fstObj.value.trim()!='' && sndObj.value.trim()!='') { if (fstObj.value <= sndObj.value) { return false; } }         return true; }     this.compare = function(inputObj, formElements) {         var fstObj = inputObj;         var sndObj = formElements[inputObj.getAttribute('objectName')]; if (fstObj != null && sndObj != null && fstObj.value.trim()!='' && sndObj.value.trim()!='') { if (!eval('fstObj.value' + inputObj.getAttribute('operate') + 'sndObj.value')) { return false; } }         return true;     }          this.limit = function (inputObj) {         var len = inputObj.value.length;         if (len) {             var minv = inputObj.getAttribute('min');             var maxv = inputObj.getAttribute('max');             minv = minv || 0;             maxv = maxv || Number.MAX_VALUE;             return minv <= len && len <= maxv;         }         return true;     }          this.range = function (inputObj) {         var val = parseInt(inputObj.value);         if (inputObj.value) {             var minv = inputObj.getAttribute('min');             var maxv = inputObj.getAttribute('max');             minv = minv || 0;             maxv = maxv || Number.MAX_VALUE;                      return minv <= val && val <= maxv;         }         return true;     }          this.requireChecked = function (inputObj) {         var minv = inputObj.getAttribute('min');         var maxv = inputObj.getAttribute('max');         minv = minv || 1;         maxv = maxv || Number.MAX_VALUE;              var checked = 0;         var groups = document.getElementsByName(inputObj.name);                  for(var i=0;i<groups.length;i++) {             if(groups[i].checked) checked++;                      }         return minv <= checked && checked <= maxv;     }          this.filter = function (inputObj) {         var value = inputObj.value;         var allow = inputObj.getAttribute('allow');         if (value.trim()) {             return new RegExp("^.+\.(?=EXT)(EXT)$".replace(/EXT/g, allow.split(/\s*,\s*/).join("|")), "gi").test(value);         }         return true;     }          this.isNo = function (inputObj) {         var value = inputObj.value;         var noValue = inputObj.getAttribute('noValue');         return value!=noValue;     } this.checkReg = function(inputObj, reg, msg) { inputObj.value = inputObj.value.trim(); if (inputObj.value == '') { return; } else { if (!reg.test(inputObj.value)) {                 this.addErrorMsg(inputObj.name,msg);             } } } this.passed = function() { if (this.errMsg.length > 0) { FormValid.showError(this.errMsg,this.errName); frt = document.getElementsByName(this.errName[0])[0];                          if (frt.type!='radio' && frt.type!='checkbox') {                 frt.focus();             } return false; } else { return true; } } this.addErrorMsg = function(name,str) { this.errMsg.push(str);         this.errName.push(name); }      this.addAllName = function(name) {         FormValid.allName.push(name); }      } FormValid.allName = new Array(); FormValid.showError = function(errMsg) {     var msg = "";     for (i = 0; i < errMsg.length; i++) {         msg += "- " + errMsg[i] + "\n";     }     alert(msg); } function validator(frm) {     var formElements = frm.elements;     var fv = new FormValid(frm);          for (var i=0; i<formElements.length;i++) {         var validType = formElements[i].getAttribute('valid');         var errorMsg = formElements[i].getAttribute('errmsg');         if (validType==null) continue;         fv.addAllName(formElements[i].name);         var vts = validType.split('|');         var ems = errorMsg.split('|');         for (var j=0; j<vts.length; j++) {             var curValidType = vts[j];             var curErrorMsg = ems[j];                          switch (curValidType) {             case 'isNumber':             case 'isEmail':             case 'isPhone':             case 'isMobile':             case 'isIdCard':             case 'isMoney':             case 'isZip':             case 'isQQ':             case 'isInt':             case 'isEnglish':             case 'isChinese':             case 'isUrl':             case 'isDate':             case 'isTime':                 fv.checkReg(formElements[i],RegExps[curValidType],curErrorMsg);                 break;             case 'regexp':                 fv.checkReg(formElements[i],new RegExp(formElements[i].getAttribute('regexp'),"g"),curErrorMsg);                 break;             case 'custom':                 if (!eval(formElements[i].getAttribute('custom')+'(formElements[i],formElements)')) {                     fv.addErrorMsg(formElements[i].name,curErrorMsg);                 }                 break;             default :                 if (!eval('fv.'+curValidType+'(formElements[i],formElements)')) {                     fv.addErrorMsg(formElements[i].name,curErrorMsg);                 }                 break;             }         }     }     return fv.passed(); } String.prototype.trim = function() {     return this.replace(/^\s*|\s*$/g, ""); } var RegExps = function(){}; RegExps.isNumber = /^[-\+]?\d+(\.\d+)?$/; RegExps.isEmail = /([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)/; RegExps.isPhone = /^(($\d{2,3}$)|(\d{3}\-))?($0\d{2,3}$|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$/; RegExps.isMobile = /^(($\d{2,3}$)|(\d{3}\-))?13\d{9}$/; RegExps.isIdCard = /(^\d{15}$)|(^\d{17}[0-9Xx]$)/; RegExps.isMoney = /^\d+(\.\d+)?$/; RegExps.isZip = /^[1-9]\d{5}$/; RegExps.isQQ = /^[1-9]\d{4,10}$/; RegExps.isInt = /^[-\+]?\d+$/; RegExps.isEnglish = /^[A-Za-z]+$/; RegExps.isChinese = /^[\u0391-\uFFE5]+$/; RegExps.isUrl = /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/; RegExps.isDate = /^\d{4}-\d{1,2}-\d{1,2}$/; RegExps.isTime = /^\d{4}-\d{1,2}-\d{1,2}\s\d{1,2}:\d{1,2}:\d{1,2}$/; </script> <script type="text/javascript"> function addLoadEvent(func) { var oldonload = window.onload; if (typeof window.onload != 'function') { window.onload = func; } else { window.onload = function() { oldonload(); func(); } } } function prepareInputsForHints() {     var inputs = document.getElementsByTagName("input");     for (var i=0; i<inputs.length; i++){         // test to see if the hint span exists first         if (inputs[i].parentNode.getElementsByTagName("span")[0]) {             // the span exists! on focus, show the hint             inputs[i].onfocus = function () {                 this.parentNode.getElementsByTagName("span")[0].style.display = "inline";             }             // when the cursor moves away from the field, hide the hint             inputs[i].onblur = function () {                 this.parentNode.getElementsByTagName("span")[0].style.display = "none";             }         }     }     // repeat the same tests as above for selects     var selects = document.getElementsByTagName("select");     for (var k=0; k<selects.length; k++){         if (selects[k].parentNode.getElementsByTagName("span")[0]) {             selects[k].onfocus = function () {                 this.parentNode.getElementsByTagName("span")[0].style.display = "inline";             }             selects[k].onblur = function () {                 this.parentNode.getElementsByTagName("span")[0].style.display = "none";             }         }     } } addLoadEvent(prepareInputsForHints); </script> <script type="text/javascript"> FormValid.showError = function(errMsg,errName) {     for (key in FormValid.allName) {         document.getElementById('errMsg_'+FormValid.allName[key]).innerHTML = '';     }     for (key in errMsg) {         document.getElementById('errMsg_'+errName[key]).innerHTML = errMsg[key];     } } </script> </head> <body> <h1>表单验证提示效果</h1> <form action="" method="post" onsubmit="return validator(this)"> <dl>     <dt><label for="name">帐号:</label></dt>     <dd><input name="name" id="name"type="text" valid="required" errmsg="用户名不能为空!" />     <span class="hint" id="errMsg_name">注册帐号（只支持数字和字母,如:love,love520）<span class="hint-pointer"></span></span>    </dd>          <dt><label for="password">密码：</label></dt>     <dd><input name="password" id="password" type="password" valid="required" errmsg="密码不能为空!" />     <span class="hint" id="errMsg_password">请输入密码,请最少输入最少6位最多12位密码<span class="hint-pointer"> </span></span>    </dd>          <dt><label for="password2">确认密码：</label></dt>     <dd>     <input name="password2" id="password2"　type="text" type="password" valid="eqaul" eqaulName="password" errmsg="两次密码不同!" />     <span class="hint" id="errMsg_password2">请再输入一次上面的密码<span class="hint-pointer"></span></span>    </dd>          <dt><label for="email">邮箱:</label></dt>     <dd><input name="email" id="email"type="text" valid="required|isEmail" errmsg="Email不能为空|Email格式不对!"/>     <span class="hint" id="errMsg_email">请输入邮箱(Email),推荐使用网易邮箱@163.com<span class="hint-pointer"></span></span>    </dd>          <dt><label for="year">生日:</label></dt>     <dd><select id="year" name="year">             <option value="1983">1983</option>             <option value="1984">1984</option>             <option value="1985">1985</option>         </select>年<select name="m" id="m">      <option value="5">5</option>      <option value="6">6</option>      <option value="7">7</option>      <option value="12">12</option> </select>月<select name="d" id="d">      <option value="5">5</option>      <option value="6">6</option>      <option value="7">7</option>      <option value="12">12</option> </select>日<span class="hint">请输入你的生日<span class="hint-pointer"></span></span>     </dd>     <dt><label for="qq">QQ/MSN:</label></dt>     <dd><input name="qq" id="qq" type="text" valid="required" errmsg="没有填写QQ或MSN"/>     <span class="hint" id="errMsg_qq">请输入你的QQ或MSN号码<span class="hint-pointer"></span></span>    </dd>     <dt><label for="tel">电话:</label></dt>     <dd><input name="tel" id="tel" type="text" valid="required|isMobile" errmsg="手机不能为空|手机格式不对!" />     <span class="hint" id="errMsg_tel">请输入你的电话<span class="hint-pointer"></span></span>    </dd>     <dt class="button"></dt>     <dd class="button"><input type="submit" name="Submit" value=" 提 交 " class="button2"/></dd> </dl> </form> </p> </body> </html>

[Ctrl+A 全选注:引入外部Js需再刷新一下页面才能执行]

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