form表单验证

邮箱验证

if (mailbox.val().length != 0) {
　　if (mailbox.val().charAt(0) == "." || mailbox.val().charAt(0) == "@" || mailbox.val().indexOf('@', 0) == -1 || mailbox.val().indexOf('.', 0) == -1 || mailbox.val().lastIndexOf("@") == mailb　　ox.val().length - 1 || mailbox.val().lastIndexOf(".") == mailbox.val().length - 1) {
　　alert("Email地址格式不正确！");
　　mailbox.focus();
　　return false;
}

} else {
　　alert("Email不能为空！");
　　mailbox.focus();
　　return false;
}



-----------------------------------------------------------------------


<script language="javascript">
function TosendContent(){
    var th=document.form
    if (th.name.value==""){
        alert('请输入您的姓名!');
        th.name.focus();
        return false;
    }
    if (th.contact.value==""){
        alert('请输入联系方式!');
        th.contact.focus();
        return false;
    }
  if(th.email.value.length!=0){   
          if (th.email.value.charAt(0)=="."   ||                   
                th.email.value.charAt(0)=="@"||                 
                th.email.value.indexOf('@',   0)   ==   -1   ||     
                th.email.value.indexOf('.',   0)   ==   -1   ||     
                th.email.value.lastIndexOf("@")==th.email.value.length-1   ||     
                th.email.value.lastIndexOf(".")==th.email.value.length-1)
         {alert("Email地址格式不正确！");th.email.focus();return false;}   
   }else {alert("Email不能为空！"); th.email.focus();return false;} 
    
    if (th.content.value==""){
        alert('请输入联系方式!');
        th.content.focus();
        return false;
    }


    

}
</script>



HTml代码如下：

<form action="/plus/diy.php" method="post" name="form" id="form1" onSubmit="return TosendContent()" enctype="multipart/form-data">
<input type="hidden" name="action" value="post" />
<input type="hidden" name="diyid" value="1" />
<input type="hidden" name="do" value="2" />
<div class="t12t lh140 cz1" style="90%; height:30px; margin-top:20px;">
您的姓名：<input name="name" type="text" size="35" style="margin-left:12px;" class="texts" />
<span class="cr"> *</span>
</div>

<div class="t12t lh140 cz1" style="90%; height:30px;">
联系方式：<input name="contact" type="text" style="margin-left:12px;" onKeyPress="if (event.keyCode < 45 || event.keyCode > 57) event.returnValue = false;" size="35" class="texts" />
<span class="cr"> * </span>
</div>

<script>
    function TosendContent(){
    //    name验证
        var index = document.form;
        if(index.name.value==''){
            alert('请输入姓名');
            index.name.focus();
            return false;
        }
    //    age验证
        
        if(index.age.value==''){
            alert('请输入年龄');
            index.age.focus();
            return false;
        }else if(index.age.value.length>='3'){
            alert('你的输入有误，请从新输入');
            index.age.focus();
            return false;
        }
        if(index.tel.value==''){
            alert('请输入联系方式');
            index.tel.focus();
            return false;
        }else if(index.tel.value.length!=11||isNaN(index.tel.value)){
            alert('你的输入有误，请从新输入');
            index.tel.focus();
            return false;
        }
        
    }


        
        
        


</script>




<form action="/plus/diy.php" method="post" name="form" id="form1" onsubmit="return TosendContent()" enctype="multipart/form-data">
    
    <input type="hidden" name="action" value="post">
    <input type="hidden" name="diyid" value="1">
    <input type="hidden" name="do" value="2">
    
    
    <div class="t12t lh140 cz1" style="90%; height:30px; margin-top:20px;">
    宝贝姓名：<input name="name" type="text" size="35" style="margin-left:12px;" class="texts" >
    <span class="cr"> *</span>
    </div>
        
    <div class="t12t lh140 cz1" style="90%; height:30px;">
    宝贝性别：<input type='radio' name='sex' class='np'  style="margin-left:12px;" value='男' checked>男
<input type='radio' name='sex' style="margin-left:12px;" class='np' value='女'>女    <span class="cr"> * </span>
    
<!--     <input name="contact" type="radio" style="margin-left:12px;" onkeypress="if (event.keyCode < 45 || event.keyCode > 57) event.returnValue = false;" size="35" class="texts"> -->
    
    </div>

    <div class="t12t lh140 cz1" style="90%; height:30px;">
    宝贝年龄：<input name="age" type="text" style="margin-left:12px;"   class="texts">
    <span class="cr"> *</span>
    </div>
            
    <div class="t12t lh140 cz1" style="100%;">
    联系方式：<input name="tel" type="text" style="margin-left:12px;"  class="texts" /><span class="cr"> * </span>
    </div>

    <input type="hidden" name="dede_fields" value="name,text;sex,radio;age,int;tel,int" />
<input type="hidden" name="dede_fieldshash" value="4ef48d764c2007cb44c558a038c7facd" />
    <div class="t12t lh140 cz1" style="90%;padding:5px;clear: both;margin-top: 30px;">
        <input type="submit" name="submit" value="提交" style="margin-left:70px;margin-top:10px;" class="posts">
        <input type="reset" name="reset" value="重置" style="margin-top:10px;margin-left:5px;" class="posts">
    </div>
</form>

人如代码，规矩灵活；代码如诗，字句精伦。