萬盛學電腦網 >> 腳本專題 >> javascript >> 在表單提交前進行驗證的幾種方式整理
在表單提交前進行驗證的幾種方式整理
在表單提交前進行驗證的幾種方式 .
在Django中，為了減輕後台壓力，可以利用JavaScript在表單提交前對表單數據進行驗證。下面提供了有效的幾種方式（每個.html文件為一種方式）。
formpage1.html
<!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>Example1</title>
<script type="text/javascript" src="/Resource/jquery-1.4.1.js"></script>
<script type="text/javascript">
function jump()
{
//清空表單所有數據
document.getElementById("firstname").value=""
document.getElementById("lastname").value=""
$("#firstnameLabel").text("")
$("#lastnameLabel").text("")
}
$(document).ready(function(){
$("#form1").bind("submit", function(){
var txt_firstname = $.trim($("#firstname").attr("value"))
var txt_lastname = $.trim($("#lastname").attr("value"))
$("#firstnameLabel").text("")
$("#lastnameLabel").text("")
var isSuccess = 1;
if(txt_firstname.length == 0)
{
$("#firstnameLabel").text("firstname不能為空！")
$("#firstnameLabel").css({"color":"red"});
isSuccess = 0;
}
if(txt_lastname.length == 0)
{
$("#lastnameLabel").text("lastname不能為空！")
$("#lastnameLabel").css({"color":"red"});
isSuccess = 0;
}
if(isSuccess == 0)
{
return false;
}
})
})
</script>
</head>
<body>
提交表單前進行驗證(方法一)
<hr width="40%" align="left" />
<form id="form1" method="post" action="/DealWithForm1/">
<table>
<tr>
<td>first_name:</td>
<td><input name="firstname" type="text" id="firstname" /></td>
<td><label id="firstnameLabel"></label></td>
</tr>
<tr>
<td>last_name:</td>
<td><input name="lastname" type="text" id="lastname" /></td>
<td><label id="lastnameLabel"></label></td>
</tr>
</table>
<hr width="40%" align="left" />
<button type="submit">提交</button>
<button type="button" onclick="jump();">取消</button>
</form>
</body>
</html>
formpage2.html
<!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>Example2</title>
<script type="text/javascript" src="/Resource/jquery-1.4.1.js"></script>
<script type="text/javascript">
function jump()
{
//清空表單所有數據
document.getElementById("firstname").value=""
document.getElementById("lastname").value=""
$("#firstnameLabel").text("")
$("#lastnameLabel").text("")
}
function check(){
var txt_firstname = $.trim($("#firstname").attr("value"))
var txt_lastname = $.trim($("#lastname").attr("value"))
$("#firstnameLabel").text("")
$("#lastnameLabel").text("")
var isSuccess = 1;
if(txt_firstname.length == 0)
{
$("#firstnameLabel").text("firstname不能為空！")
$("#firstnameLabel").css({"color":"red"});
isSuccess = 0;
}
if(txt_lastname.length == 0)
{
$("#lastnameLabel").text("lastname不能為空！")
$("#lastnameLabel").css({"color":"red"});
isSuccess = 0;
}
if(isSuccess == 0)
{
return false;
}
return true;
}
</script>
</head>
<body>
提交表單前進行驗證(方法二)
<hr width="40%" align="left" />
<form id="form1" method="post" action="/DealWithForm1/" onsubmit="return check()">
<table>
<tr>
<td>first_name:</td>
<td><input name="firstname" type="text" id="firstname" /></td>
<td><label id="firstnameLabel"></label></td>
</tr>
<tr>
<td>last_name:</td>
<td><input name="lastname" type="text" id="lastname" /></td>
<td><label id="lastnameLabel"></label></td>
</tr>
</table>
<hr width="40%" align="left" />
<button type="submit">提交</button>
<button type="button" onclick="jump();">取消</button>
</form>
</body>
</html>
formpage3.html
<!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>Example3</title>
<script type="text/javascript" src="/Resource/jquery-1.4.1.js"></script>
<script type="text/javascript">
function jump()
{
//清空表單所有數據
document.getElementById("firstname").value=""
document.getElementById("lastname").value=""
$("#firstnameLabel").text("")
$("#lastnameLabel").text("")
}
function checktosubmit(){
var txt_firstname = $.trim($("#firstname").attr("value"))
var txt_lastname = $.trim($("#lastname").attr("value"))
$("#firstnameLabel").text("")
$("#lastnameLabel").text("")
var isSuccess = 1;
if(txt_firstname.length == 0)
{
$("#firstnameLabel").text("firstname不能為空！")
$("#firstnameLabel").
javascript排行
程序編程推薦
相關文章
copyright © 萬盛學電腦網 all rights reserved