<script type="text/javascript">var checkSubmitFlg = false;function checkSubmit() {if (!checkSubmitFlg) {// 第一次提交checkSubmitFlg = true;return true;} else {//重复提交alert("Submit again!");return false;}}</script>//以下三种方式分别调用<form οnsubmit="return checkSubmit();"><input type="submit" οnclick="return checkSubmit();" /><input type="button" οnclick="document.forms[0].action='./test';document.forms[0].submit();return checkSubmit();" />
