<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 onsubmit="return checkSubmit();">
<input type="submit" onclick="return checkSubmit();" />
<input type="button" onclick="document.forms[0].action='./test';document.forms[0].submit();return checkSubmit();" />
