An instance of JavaScript to prevent forms from repeating submissions

Source: Internet
Author: User
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<! DOCTYPE html>

<meta http-equiv= "Content-Type" content= "text/html; charset=UTF-8" />  <title>防止重复表单提交</title>  <style>   #refresh{  display: none;  width:200px;  height:20px;  background-color: #ff0;        </style>    <script>  var inprocess = false window.onload = function   document.forms[ "picker" ].onsubmit = validateSubmit;  document.getElementById( "refresh" ).onclick = startOver;  function validateSubmit () {  // 防止重复的表单提交  if (inprocess) return inprocess = true console.log(inprocess);  document.getElementById( "submitbutton" ).disabled = true     document.getElementById( "refresh" ).style.display = "block" document.getElementById( "message" ).innerHTML = "<p>正在processing,稍等</p>" return false function startOver(){  inprocess = false document.getElementById( "submitbutton" ).disabled = false document.getElementById( "message" ).innerHTML = "" document.getElementById( "refresh" ).style.display = "none"     </script>      <body>      <form id= "picker" method= "post" action= "" group1:<input type= "radio" name= "group1" value= "one" />  group2:<input type= "radio" name= "group1" value= "two" />  group3:<input type= "radio" name= "group1" value= "three" /><br /><br />  Input 1: <input type= "text" id= "intext" />  Input 2: <input type= "text" id= "intext2" />  Input 3: <input type= "text" id= "intext3" />  <input type= "submit" id= "submitbutton" value= "send form" />  </form>  <div id= "refresh" <p>单击我</p>  </div>  <div id= "message" ></div>  </body> 
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