HTML的内置判断函数为啥没有执行

2012-12-31

HTML的内置判断函数为什么没有执行？如题。输入非法数据为什么不报错呢？htmlheadtitleregister info/

HTML的内置判断函数为什么没有执行？
如题。输入非法数据为什么不报错呢？

<html>
   <head>
   <title>register info</title>
   <meta http-equiv="Content-Type" content="text/html;charset=gb2312">
   </head>
   <script>
   function check(){
   username=document.form1.value;
   pwd1=document.form1.pwd1.value;
   pwd2=document.form1.pwd2.value;
   year=document.form1.year.value;
   month=document.form1.month.value;
   day=document.form1.day.value;
   email=document.form1.email.value;
   interest=document.form1.interest.value;
   
   if(username.length<6||username.length>15){
   alert("usename must be 5-15char");
   return false;
   }
   if(pwd1!=pwd2){
   alert("password is not correct!");
   return false;
   }
   if(year.lenth!=4||month>13||month<1||day>32||day<1{
   alert("birthday is incorrect!")
   return false;
   }
   if(email=""||(email.indexof('@'==-1)||(email.indexof('.')==-1)){
   alert("email format is incorrect!")
   return false;
   }
   return true;
   }
   </script>
   
   <body bgcolor="#FFFFFF" text="#000000">
   <p align="center">input register info</p>
   <form name="form1" method="post" action="register.jsp" OnSubmit="return check();">
   <table width="36%" border="1" cellspacing="1" cellpadding="1"
   align="center" height="160">
   <tr>
   <td width="45%">username(6-15)bit</td>
   <td width="55%">
   <input type="text" name="username" size="15">
   </td>
   </tr>
   <tr>
   <td width="45%">password(6-10)bit</td>
   <td width="55%">
   <input type="password" name ="pwd1" size="10">
   </td>
   </tr>
   <tr>
   <td width="45%">password confirm</td>
   <td width="55%">
   <input type="password" name ="pwd2" size="10">
   </td>
   </tr>
   <tr>
   <td width="45%">birth day</td>
   <td width="55%">
   <input type="text" name ="year" size="4">
   year
   <input type="text" name ="month" size="2">
   month
   <input type="text" name ="day" size="2">
   day</td>
   </tr>
   <tr>
   <td width="45%">sex</td> 
 
   <td width="55%">
   <input type="radio" name ="gender" value="man" selected>
   man
   <input type="radio" name ="gender" value="woman">
   woman
   </td>
   </tr>
   <tr>
   <td width="45%">email</td>
   <td width="55%">
   <input type="text" name ="email" size="20">
   </td>
   </tr>
   <tr>
   <td width="45%">interest</td>
   <td width="55%">
   <input type="text" name ="interest" size="20">
   </td>
   </tr>
   </table>
   <p align="center">
   <input type="submit" name="Submit" value="tijiao">
   <input type="reset" name="Submit2" value="chongzhi">
   </p>
   </form>
   <p>&nbsp;</p>
   <p>&nbsp;</p>
   
   </body>
 </html>

[解决办法]
建议楼主下个 firebug 来调试

全是“找茬”的问题
username=document.form1.username.value;

if(email==""
[解决办法]
(email.indexof('@')==-1)
[解决办法]
(email.indexof('.')==-1)){
[解决办法]
帮你改了一下现在没有错误了但是判断的逻辑你自己再看看


<html>
   <head>
   <title>register info</title>
   <meta http-equiv="Content-Type" content="text/html;charset=gb2312">
   </head>
   <script>
   function check(){
   username=document.form1.value;
   pwd1=document.form1.pwd1.value;
   pwd2=document.form1.pwd2.value;
   year=document.form1.year.value;
   month=document.form1.month.value;
   day=document.form1.day.value;
   email=document.form1.email.value;
   interest=document.form1.interest.value;
    
   if(email===""
[解决办法]
username.length<6
[解决办法]
username.length>15){
   alert("usename must be 5-15char");
   return false;
   }
   if(pwd1!=pwd2){
   alert("password is not correct!");
   return false;
   }
   if(year.lenth!=4
[解决办法]
month>13
[解决办法]
month<1
------解决方案--------------------  
day>32
[解决办法]
day<1){
   alert("birthday is incorrect!");
   return false;
   }
   if(email===""
[解决办法]
(email.indexof('@'==-1)
[解决办法]
(email.indexof('.')==-1))){
   alert("email format is incorrect!");
   return false;
   }
   return true;
   }
   </script>
    
   <body bgcolor="#FFFFFF" text="#000000">
   <p align="center">input register info</p>
   <form name="form1" method="post" action="register.jsp" OnSubmit="return check();">
   <table width="36%" border="1" cellspacing="1" cellpadding="1"
   align="center" height="160">
   <tr>
     <td width="45%">username(6-15)bit</td>
     <td width="55%">
         <input type="text" name="username" size="15">
         </td>
         </tr>
         <tr>
             <td width="45%">password(6-10)bit</td>
             <td width="55%">
             <input type="password" name ="pwd1" size="10">
             </td>
             </tr>
             <tr>
             <td width="45%">password confirm</td>
             <td width="55%">
             <input type="password" name ="pwd2" size="10">
             </td>
             </tr>
             <tr>
             <td width="45%">birth day</td>
             <td width="55%">
             <input type="text" name ="year" size="4">
             year
             <input type="text" name ="month" size="2">
             month
             <input type="text" name ="day" size="2"> 
 
             day</td>
             </tr>
             <tr>
             <td width="45%">sex</td>
             <td width="55%">
             <input type="radio" name ="gender" value="man" selected>
             man
             <input type="radio" name ="gender" value="woman">
             woman
             </td>
             </tr>
             <tr>
             <td width="45%">email</td>
             <td width="55%">
             <input type="text" name ="email" size="20">
             </td>
             </tr>
             <tr>
             <td width="45%">interest</td>
             <td width="55%">
             <input type="text" name ="interest" size="20">
             </td>
             </tr>
             </table>
             <p align="center">
             <input type="submit" name="Submit" value="tijiao">
             <input type="reset" name="Submit2" value="chongzhi">
             </p>
             </form>
             <p>&nbsp;</p>
             <p>&nbsp;</p>
              
   </body>
 </html>

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HTML的内置判断函数为啥没有执行