<button id="btn" disabled="disabled">确定</button>

2>Javascript里

<script>

    $("#btn").attr("disabled","true");

    $("#btn").attr("disabled","disabled");

    $("#btn").attr("disabled","false");

    $("#btn").removeAttr("disabled","disabled");

</script>

<a id="mybtn">button</a>

<script>

    $("a").click(function(){

        alert("1");

        $(this).css("color","#CCC");

        $(this).unbind("click");

    })

</script>

a标签 点击一次后设置点击失效，防止重复提交；

$("a").one("click",function(){

  $(this).click(function (){return false;});

});