防止表单重复提交

防止表单重复提交

<script type="text/javascript">

              var checkSubmitFlg = false;//设定布尔变量

              function checkSubmit() {//单击提交按钮时执行该函数

                     if (checkSubmitFlg == true) {//如果checkSubmitFlg为真

                            return false;//就返回false

                     }

                     checkSubmitFlg = true;

                     return true;

              }

              //如果双击按钮就返回false

              document.ondblclick = function docondblclick() {

                     window.event.returnValue = false;

              }

              //如果单击按钮checkSubmitFlg值为true就返回false

              document.onclick = function doconclick() {

                     if (checkSubmitFlg) {

                            window.event.returnValue = false;

                     }

              }

       </script>

 

<form action="" method="post">

              输入任意信息：

              <input type="text" name="info" onsubmit="return checkSubmit();"/>

              <input type="submit" value="提交"/>

       </form>