a标签和button按钮只允许点击一次

button

方法：加上属性disabled = “disabled” 或者 disabled = “true”

1>HTML里<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标签

方法：在点击一次后，解除绑定。

<a id="mybtn">button</a><script>    $("a").click(function(){        alert("1");        $(this).css("color","#CCC");        $(this).unbind("click");    })</script>