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<script>
var hasClick = false;
function cancelRequest() {
if (hasClick) alert('取消成功')
else {
hasClick = true
alert('再次点击<取消申请>确认取消')
setTimeout(function () { hasClick=false},3000);//加个计时器,如果3s后没有再次点击按钮则恢复再点点击确认
}
}
</script>
<input type="button" onclick="cancelRequest()" value="取消申请" />