验证对象：
Input、textarea
验证内容：
1. 多个输入组件值是否相同（输入密码和重新输入密码是否一致）
2. 模式匹配
3. Input、textarea组件其他属性（自带和自定义）如maxlength等
验证结果提示显示：
1. 结果小图标（“√”和“×”）直接显示在输入框同行，包括提示信息
2. 提示信息换行显示
3. 集中显示在form表单的底部(可自行修改)
关键部分：
输入内容是否一致：这个组件使用bind属性绑定相同的值表示同一组需要输入内容一致的组件。
模式匹配：textfield.getAttribute("pattern");这里可以内置几个模式，如电话号码、邮箱等。
其他属性：例如textfield.getAttribute("empty");和textfield.getAttribute("max")；
基本验证步骤：
1.在onchange事件（validateOnChange）中对基本input组件验证。
一般先判断input组件本身验证是否通过，然后判断关联验证是否通过。
2.form表单提交前需要对表单中的input验证（这里覆盖了onsubmit事件）
如果form表单中的input有验证未通过可以直接返回false，不进行提交。如果检查项未提示验证不通过，需要出发一下change事件再一次验证是否通过。
3.将验证提示信息加到对应位置，同时会涉及input的样式修改。
注：适合同步验证，不太适合异步。
可完善：如果form是新增窗口（通过显示隐藏新增div实现），form每次需要初始化，此时需要对验证信息都清空一次，这里需要补上删除各种样式。
可参考代码：（复制自Tinyshop->framework->web->js ->source->form）
/**
* Form表单类及自动验证插件 1.5
*/
function FireEvent(elem, eventName)
{
if(typeof(elem) == ‘object‘)
{
eventName = eventName.replace(/^on/i,‘‘);
if (document.all)
{
eventName = "on"+eventName;
elem.fireEvent(eventName);
}
else
{
var evt = document.createEvent(‘HTMLEvents‘);
evt.initEvent(eventName,true,true);
elem.dispatchEvent(evt);
}
}
}
(function ( )
{
var formMsg = null;
//if (window.addEventListener) window.addEventListener("load", init, false);
//else if (window.attachEvent) window.attachEvent("onload", init);
addEvent(window,‘load‘,init);
function addEvent(obj, type, fn)
{
if (obj.attachEvent)
{
obj[‘e‘+type+fn] = fn;
obj[type+fn] = function(){obj[‘e‘+type+fn]( window.event );}
obj.attachEvent(‘on‘+type, obj[type+fn]);
}
else
obj.addEventListener(type, fn, false);
}
function removeEvent(obj, type, fn)
{
if (obj.detachEvent)
{
obj.detachEvent(‘on‘+type, obj[type+fn]);
obj[type+fn] = null;
}
else
obj.removeEventListener(type, fn, false);
}
function init( ) {
for(var i = 0; i < document.forms.length; i++) {
var f = document.forms[i];
var needsValidate = f.getAttribute("needsValidate");
var needsValidation = false;
for(j = 0; j < f.elements.length; j++) {
var e = f.elements[j];
if (e.type != "text" && e.type!="password" && e.type!=‘select-one‘ && e.type!=‘textarea‘ && e.type!=undefined && e.type!=null ) continue;
var pattern = e.getAttribute("pattern");
e.setAttribute("inform",i);
var autoCheck = (e.getAttribute("autoCheck") == null || e.getAttribute("autoCheck")!=‘false‘) ;
var required = e.getAttribute("required") != null;
if (required && !pattern) {
pattern = "\\S";
e.setAttribute("pattern", pattern);
}
if (pattern && autoCheck)
{
//e.onchange = validateOnChange;
addEvent(e,‘change‘,validateOnChange);
needsValidation = true;
}
addEvent(e,‘focus‘,onFocus);
addEvent(e,‘blur‘,onBlur);
}
if(needsValidate) needsValidation = true;
if (needsValidation){f.onsubmit = validateOnSubmit;f.setAttribute(‘novalidate‘,‘true‘);}
}
}
function onFocus(event){
event= event || arguments.callee.caller.arguments[0]||window.event;
var e=event.srcElement||event.target||event;
var textfield = e;
if(e.parentNode.className.indexOf(‘focus‘)==-1)e.parentNode.className = textfield.parentNode.className += " focus";
}
function onBlur(event){
event= event || arguments.callee.caller.arguments[0]||window.event;
var e=event.srcElement||event.target||event;
var textfield = e;
if(e.parentNode.className.indexOf(‘focus‘)!=-1)e.parentNode.className = textfield.parentNode.className.replace(" focus","");
}
function updateFormMsg(textfield,msg)
{
if(textfield.getAttribute("inform")!=undefined){
var inform = textfield.getAttribute("inform");
formMsg = document.forms[inform].getAttribute("formMsg");
if(formMsg)formMsg = document.getElementById(formMsg);
}
if(formMsg){
if(msg.className.indexOf(‘invalid-msg‘) !=-1 ){
formMsg.style.display = ‘‘;
}
else{
formMsg.style.display = ‘none‘;
}
formMsg.innerHTML = msg.innerHTML;
}
}
function validateOnChange(event)
{
event= event || arguments.callee.caller.arguments[0]||window.event;
var e=event.srcElement||event.target||event;
var textfield = e;
var pattern = textfield.getAttribute("pattern");
switch(pattern)
{
case ‘required‘: pattern = /\S+/i;break;
case ‘name‘: pattern = /^[a-zA-Z_][a-zA-Z0-9_-]{5,}$/i;break;
case ‘email‘: pattern = /^\w+([-+.]\w+)*@\w+([-.]\w+)+$/i;break;
case ‘qq‘: pattern = /^[1-9][0-9]{4,}$/i;break;
case ‘id‘: pattern = /^\d{15}(\d{2}[0-9x])?$/i;break;
case ‘ip‘: pattern = /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/i;break;
case ‘zip‘: pattern = /^\d{6}$/i;break;
case ‘phone‘: pattern = /^((\d{3,4})|\d{3,4}-)?\d{7,8}(-\d{3})*$/i;break;
case ‘mobi‘: pattern = /^1[3-9]\d{9}$/i;break;
case ‘url‘: pattern = /^[a-zA-z]+:\/\/(\w+(-\w+)*)(\.(\w+(-\w+)*))+(\/?\S*)?$/i;break;
case ‘date‘: pattern = /^(?:(?!0000)[0-9]{4}-(?:(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])-(?:29|30)|(?:0[13578]|1[02])-31)|(?:[0-9]{2}(?:0[48]|[2468][048]|[13579][26])|(?:0[48]|[2468][048]|[13579][26])00)-02-29)$/i;break;
case ‘datetime‘: pattern = /^(?:(?!0000)[0-9]{4}-(?:(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])-(?:29|30)|(?:0[13578]|1[02])-31)|(?:[0-9]{2}(?:0[48]|[2468][048]|[13579][26])|(?:0[48]|[2468][048]|[13579][26])00)-02-29) (?:(?:[0-1][0-9])|(?:2[0-3])):(?:[0-5][0-9]):(?:[0-5][0-9])$/i;break;
case ‘int‘: pattern = /^\d+$/i;break;
case ‘float‘: pattern = /^(-)?\d+\.?\d*$/i;break;
default: pattern = new RegExp(‘^‘+pattern+‘$‘,‘i‘);
}
var value = textfield.value;
var alt = textfield.getAttribute("alt");
var minlen = textfield.getAttribute("minlen");
var maxlen = textfield.getAttribute("maxlen");
var min = textfield.getAttribute("min");
var max = textfield.getAttribute("max");
var empty = textfield.getAttribute("empty");
var disabled = textfield.getAttribute("disabled");
var flag = false;
if(disabled!=null && disabled=="disabled") return;
if(maxlen!=null && value.length>maxlen) flag=true;
if(minlen!=null && value.length<minlen) flag=true;
if(min!=null && parseFloat(value)<min) flag=true;
if(max!=null && parseFloat(value)>max) flag=true;
var error = (flag || (empty==null && value==‘‘) ||(value!=‘‘ && value.search(pattern) == -1));
showMsg({error:error,id:textfield,msg:alt,empty:empty});
if(textfield.type == ‘password‘ && textfield.className.indexOf("invalid-text")==-1)
{
var bind = textfield.getAttribute("bind");
var bind_flag = true;
var bind_arr = document.getElementsByName(bind);
var bind_arr_len = bind_arr.length;
for(var i=0; i<bind_arr_len; i++)
{
if(bind_arr[i].name == bind && bind_arr[i].value != textfield.value && bind_arr[i].value != ‘‘)
{
bind_flag = false;
}
}
if(msg==undefined) msg=textfield.nextSibling;
if(!bind_flag )
{
msg.className = "invalid-msg";
textfield.className=textfield.className.replace(" valid-text","");
textfield.parentNode.className = textfield.parentNode.className.replace(" valid","");
if(textfield.className.indexOf("invalid-text")==-1){
textfield.className += ‘ invalid-text‘;
textfield.parentNode.className = textfield.parentNode.className += " invalid";
}
msg.innerHTML = ‘两次输入密码不一致‘;
updateFormMsg(textfield,msg);
}
else
{
msg.className = "valid-msg";
textfield.className=textfield.className.replace(" invalid-text","");
textfield.parentNode.className = textfield.parentNode.className.replace(" invalid","");
if(textfield.className.indexOf("valid-text")==-1){
textfield.className += ‘ valid-text‘;
textfield.parentNode.className = textfield.parentNode.className += " valid";
}
msg.innerHTML = ‘‘;
updateFormMsg(textfield,msg);
if(bind_arr_len>0 && bind_arr[0].value.length>0)showMsg({id:bind_arr[0],error:false,msg:‘‘});
}
}
if(textfield.className.indexOf("invalid-text")==-1) return true;
else return false;
}
function showMsg(obj){
if(obj[‘id‘]==undefined || obj[‘id‘]==null){
var event=arguments.callee.caller.arguments[0]||window.event;
var e=event.srcElement||event.target;
var textfield = e;
}else{
var textfield = obj[‘id‘];
}
if(obj[‘formMsg‘]!==undefined && obj[‘formMsg‘]!=null){
formMsg = obj[‘formMsg‘];
}
var error = obj[‘error‘];
var initmsg = null;
var alt = (typeof(obj[‘msg‘])==‘string‘&&obj[‘msg‘].length>0)?obj[‘msg‘]:null;
var empty = obj[‘empty‘]==undefined?null:obj[‘empty‘];
var initmsg_attr = textfield.getAttribute(‘initmsg‘);
var value = textfield.value;
initmsg = (initmsg!=null?initmsg:(initmsg_attr!=null&&initmsg_attr!=‘‘?initmsg_attr:‘‘));
var old_status = (textfield.className.indexOf("invalid-text")==-1);
if(error){
textfield.className=textfield.className.replace(" invalid-text","");
textfield.className=textfield.className.replace(" valid-text","");
textfield.parentNode.className = textfield.parentNode.className.replace(" invalid","");
textfield.parentNode.className = textfield.parentNode.className.replace(" valid","");
if(textfield.className.indexOf("invalid-text")==-1){
textfield.className += " invalid-text";
textfield.parentNode.className = textfield.parentNode.className += " invalid";
}
msg=textfield.nextSibling;
while(msg && msg.nodeType==3)msg=msg.nextSibling;
if(msg && (msg.tagName==‘LABEL‘ || msg.tagName==‘SPAN‘))
{
msg.className = "invalid-msg";
if((initmsg_attr==null || initmsg_attr==‘‘)){
if(old_status) textfield.setAttribute(‘initmsg‘, msg.innerHTML);
else textfield.setAttribute(‘initmsg‘,‘‘);
}
if(alt!=null && alt!=‘‘){
msg.innerHTML=alt;
updateFormMsg(textfield,msg);
}
else{
msg.innerHTML = ‘‘;
updateFormMsg(textfield,msg);
}
}
else
{
var new_msg=document.createElement("LABEL");
new_msg.className = "invalid-msg";
if(initmsg_attr==null || initmsg_attr==‘‘) textfield.setAttribute(‘initmsg‘, ‘‘);
if(alt!=null){
new_msg.innerHTML=alt;
updateFormMsg(textfield,new_msg);
}
textfield.parentNode.insertBefore(new_msg,msg);
}
}
else{
textfield.className=textfield.className.replace(" invalid-text","");
textfield.className=textfield.className.replace(" valid-text","");
textfield.parentNode.className = textfield.parentNode.className.replace(" invalid","");
textfield.parentNode.className = textfield.parentNode.className.replace(" valid","");
if(empty!=null && value==‘‘);
else
if(textfield.className.indexOf("valid-text")==-1){
textfield.className +=" valid-text";
textfield.parentNode.className = textfield.parentNode.className += " valid";
}
msg=textfield.nextSibling;
while(msg && msg.nodeType==3)msg=msg.nextSibling;
if(msg && (msg.tagName==‘LABEL‘ || msg.tagName==‘SPAN‘ ))
{
if(empty!=null && value==‘‘)
msg.className = "";
else
msg.className = "valid-msg";
if(old_status){
if(initmsg==‘‘) textfield.setAttribute(‘initmsg‘, msg.innerHTML);
if(initmsg!=null && initmsg != ‘‘){
msg.innerHTML= initmsg;
updateFormMsg(textfield,msg);
}
}else{
msg.innerHTML= initmsg;
updateFormMsg(textfield,msg);
}
}
else
{
var new_msg=document.createElement("LABEL");
if(empty!=null && value==‘‘)
new_msg.className = "";
else
new_msg.className = "valid-msg";
textfield.setAttribute(‘initmsg‘, ‘‘);
new_msg.innerHTML= initmsg ;
updateFormMsg(textfield,new_msg);
textfield.parentNode.insertBefore(new_msg,msg);
}
}
}
function validateOnSubmit() {
var invalid = false;
for(var i = 0; i < this.elements.length; i++)
{
var e = this.elements[i];
if ((e.type == "text" || e.type == "password" || e.type == "select-one" || e.type == "textarea" || e.type==undefined || e.type==null) && e.getAttribute("pattern") && e.style.display!=‘none‘ && !e.getAttribute("disabled")) {
//e.onchange = validateOnChange;
var autoCheck = (e.getAttribute("autoCheck") == null || e.getAttribute("autoCheck")!=‘false‘) ;
if(autoCheck)addEvent(e,‘change‘,validateOnChange);
if (e.className.indexOf(" invalid-text")!=-1)
{
invalid = true;
//FireEvent(e,‘focus‘);
e.focus();
break;
}
else
{
FireEvent(e,‘onchange‘);
if (e.className.indexOf(" invalid-text")!=-1)
{
invalid = true;
//FireEvent(e,‘focus‘);
e.focus();
break;
}
}
}
}
var callback = this.getAttribute("callback");
if (invalid) {
if(callback) __callback(callback,e);
return false;
} else{
if(callback){
var result = __callback(callback,null);
if(result != undefined) return result;
}
}
}
window[‘autoValidate‘]={};
window[‘autoValidate‘][‘init‘]=init;
window[‘autoValidate‘][‘validate‘]=validateOnChange;
window[‘autoValidate‘][‘showMsg‘]=showMsg;
})( );
//通过函数名回调函数
function __callback(fn){
var args = Array.prototype.slice.apply(arguments);
args.shift();
if(typeof window[fn] == ‘function‘) return window[fn].apply(this,args);
}
/**
*@author webning
*/
function Form(form)
{
this.init = function(obj)
{
for(var item in obj)
{
this.setValue(item,obj[item]);
}
}
this.clearAll = function()
{
var elements;
if(form == undefined) elements = document.forms[0].elements;
else elements=document.forms[form].elements;
var len = elements.length;
for(var i=0;i<len;i++)
{
this.setValue(elements[i].name,null);
}
}
this.getItems = function()
{
var obj=new Object();
var elements;
if(form == undefined) elements = document.forms[0].elements;
else elements=document.forms[form].elements;
var len = elements.length;
for(var i=0;i<len;i++)
{
if(obj[elements[i].name] == undefined) obj[elements[i].name]=this.getValue(elements[i].name);
}
return obj;
}
this.setValue=function(name,value)
{
var e;
if(form == undefined) e = document.forms[0].elements[name];
else e=document.forms[form].elements[name];
if(e==undefined) return;
switch(e.type)
{
case ‘text‘:
case ‘hidden‘:
case ‘textarea‘:e.value=value;break;
case ‘radio‘:
case ‘checkbox‘:
{
if(e.value==value)e.checked=true;
else e.checked=false;
}
case undefined:
{
var len=e.length;
if (len>0)
{
var _value = (‘,‘+value+‘,‘);
for(var j=0;j<len;j++)
{
if(e[j]!=undefined)
{
if(value==e[j].value || _value.indexOf(","+e[j].value+",")!=-1)e[j].checked=true;
else
{
if(value==null)e[j].checked=false;
}
}
}
}
break;
}
case ‘select-one‘: this.setSelected(e,value);break;
case ‘select-multiple‘:
{
var len=e.length;
if (len>0)
{
var _value = (‘;‘+value+‘;‘);
for(var j=0;j<len;j++)
{
if(e[j]!=undefined)
{
if(value==e[j].value || _value.indexOf(","+e[j].value+",")!=-1 || value.indexOf(","+e[j].innerHTML+",")!=-1){e[j].selected=true;}
}
}
}
}
break;
}
}
this.getValue = function(name)
{
var e;
if(form == undefined) e = document.forms[0].elements[name];
else e=document.forms[form].elements[name];
if(e==undefined) return null;
switch(e.type)
{
case ‘text‘:
case ‘hidden‘:
case ‘textarea‘:return e.value;break;
case ‘radio‘:
case ‘checkbox‘:
{
if(e.checked)e.value;
break;
}
case undefined:
{
var len=e.length;
var tmp = ‘‘;
if (len>0)
{
for(var j=0;j<len;j++)
{
if(e[j]!=undefined)
{
if(e[j].checked)
{
if(e[j].value!=‘‘) tmp += e[j].value+‘,‘;
else tmp += e[j].innerText+‘,‘;
}
}
}
}
if(tmp.length>0) tmp = tmp.substring(0,(tmp.length-1));
if(tmp!=‘‘)return tmp;
else return null;
break;
}
case ‘select-one‘: return e.value;break;
case ‘select-multiple‘:
{
var len=e.length;
if (len>0)
{
var tmp = ‘‘;
for(var j=0;j<len;j++)
{
if(e[j]!=undefined)
{
if(e[j].checked)
{
if(e[j].value!=‘‘) tem += e[j].value+‘,‘;
else tem += e[j].innerText+‘,‘;
}
}
}
}
if(tmp.length>0) tmp = tmp.substring(0,(tmp.length-1));
if(tmp!=‘‘)return tmp;
else return null;
break;
}
}
}
this.setSelected = function(obj,value)
{
objSelect=obj;
for(var i=0;i<objSelect.options.length;i++)
{
if(objSelect.options[i].value == value || objSelect.options[i].text == value)
{
objSelect.options[i].selected = true;
//break;
}
else
{
objSelect.options[i].selected = false;
}
}
}
}
