js簡單實現(xiàn)用戶注冊信息的校驗代碼

2019-11-20 21:41:03

字體：大中小

供稿：網(wǎng)友

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>用戶注冊</title>
<style type="text/css">
  @import "css/userRegister.css";
</style> 
</head>
<body id="BODY">
<div id="DIV_FORM">
<form method="post" action="url" >
 <table id="TABLE">
    <tbody>
        <tr>
           <td>用戶名：</td>
           <td>
              <input name="username"  id="USERNAME" type="text" onfocus="showDesc(this)" onblur="checkText(this)"/>
           </td>
        </tr>
        <tr>
           <td>密碼：</td>
           <td>
             <input name="password" id="PASSWORD" type="text" onfocus="showDesc(this)" onblur="checkText(this)"/>
           </td>
        </tr> 
        <tr>
           <td>確認密碼：</td>
           <td>
             <input name="password2" id="PASSWORD2" type="text" onfocus="showDesc(this)" onblur="checkText(this)"/>
           </td>
        </tr> 
        <tr>
           <td>身份證號：</td>
           <td>
             <input name="IDNumber" id="IDNUMBER" type="text" onfocus="showDesc(this)" onblur="checkText(this)"/>
           </td>
        </tr> 
        <tr>
           <td>電話號碼：</td>
           <td>
             <input name="phoneNumber" id="PHONENUMBER" type="text" onfocus="showDesc(this)" onblur="checkText(this)"/>
           </td>
        </tr> 
        <tr>
           <td>Email：</td>
           <td>
               <input name="email" id="EMAIL" type="text" onfocus="showDesc(this)" onblur="checkText(this)"/>
           </td>
        </tr> 
        <tr>
           <td> </td>
           <td align="right">
             <input type="submit" value="確認提交" />
           </td>
        </tr> 
    </tbody>  
    </table>
   <table id="TABLE2" border="0">
       <tr><td><span id="username">請輸入用戶名</span></td></tr>
       <tr><td><span id="password">請輸入密碼</span></td></tr>
       <tr><td><span id="password2">請再次輸入密碼</span></td></tr>
       <tr><td><span id="IDNumber">請輸入身份證號碼</span></td></tr>
       <tr><td><span id="phoneNumber">請輸入電話號碼</span></td></tr>
       <tr><td><span id="email">請輸入郵箱地址</span></td></tr>
    </table>
</form>
</div>
<script  type="text/javascript"  src="jslib/registerCheck.js">
</script>
</body>
</html>

registerCheck.js

復(fù)制代碼代碼如下:

//輸入框獲得焦點時，顯示提示內(nèi)容
function showDesc(obj)
{
var id= obj.name;
document.getElementById(id).style.display="inline";
}

//輸入框失去焦點時檢驗輸入內(nèi)容是否有效
function checkText(obj)
{
   //獲取輸入框的id值
   var id= obj.name;
   var text=document.getElementById(id.toString().toUpperCase()).value;

   //判斷是否為空
   if(text.replace(//s/g, "")=="")
   {
      document.getElementById(id).innerHTML="輸入不能為空";
   }
   else
   {
     //組裝方法
     //取首字母轉(zhuǎn)換為大寫,其余不變
     var firstChar=id.charAt(0).toString().toUpperCase();
     //
     var strsub=id.substring(1,id.length);
     var strMethod="check"+firstChar+strsub+"()";
     var isTrue = eval(strMethod);
     if(isTrue)
     {
         document.getElementById(id).innerHTML="輸入有效";
     }
   }


}

CSS

復(fù)制代碼代碼如下:

@charset "utf-8";
/* CSS Document */
#BODY{
text-align:center;
}

#TABLE{
    text-align:left;
    margin: auto;
    float:left;
}
#DIV_FORM{
    margin-left:300px;
}
#TABLE2{
    text-align:left;
    width:150px;
    height:150px;
}
#TABLE2 tr
{
    height:24px;
}
#TABLE2 span{
    display:none;
}