实用的JS表单验证提示效果

发布于 2016-12-13 23:04:19 | 157 次阅读 | 评论: 0 | 来源: 网友投递

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。

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);

</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"> 
    注册帐号（只支持数字和字母,如:love,love520）<span class="hint-pointer"></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!" /> 
    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>    </dd> 
     
    <dt><label for="password2">确认密码：</label></dt> 
    <dd> 
    <input name="password2" id="password2"> 
    请再输入一次上面的密码<span class="hint-pointer"></span>    </dd> 
     
    <dt><label for="email">邮箱:</label></dt> 
    <dd><input name="email" id="email"> 
    请输入邮箱(Email),推荐使用网易邮箱@163.com<span class="hint-pointer"></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>日请输入你的生日<span class="hint-pointer"></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"/> 
    请输入你的QQ或MSN号码<span class="hint-pointer"></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!" /> 
    请输入你的电话<span class="hint-pointer"></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]

JavaScript客户端脚本语言

后端技术

前端技术

数据库

热门框架

常用IDE

其他