实用的JS表单验证提示效果

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);

</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:如需引入外部Js需刷新才能执行]

实用的JS表单验证提示效果

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