js解决快速回车重复订单提交(客户端方式)

<form action="order_add_data.php" method="post" name="order_adds">

..........

<input type="submit" class="submit" id='fk_submit' value="提交添加" size="10"  onclick="return check_input();"/>

</form>

function check_input (){
var order_num=$("#order_num").val();
var dinghuo=$("#dinghuo").val();
var dinghuo_tel=$("#dinghuo_tel").val();
var shouhuo=$("#shouhuo").val();
var shouhuo_tel=$("#shouhuo_tel").val();
var songhuo_addr=$("#songhuo_addr").val();
var shangpin=$("#shangpin").val();
var shuliang=$("#shuliang").val();

if (order_num==""||dinghuo==""||dinghuo_tel==""||shouhuo==""||shouhuo_tel==""||songhuo_addr==""||shangpin==""||shuliang=="")
{
alert("带*不能为空！");
return false;
}else{
　　　　　　　//验证通过后：执行如下代码
document.order_adds.submit();
$("#fk_submit").attr('disabled',true);
return false;
}