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<span style="font-size: 14px;">

<input type="button" value="确定"id="rulesubmit" />

<scripttypescripttype="text/javascript">

var secs = 3;

var wait = secs * 1000;

var update = function(num,value){

if (num == (wait/1000)){

$("#rulesubmit").val("免费获取");

}

else{

printnr = (wait/1000) - num;

$("#rulesubmit").val("免费获取(" + printnr +")");

}

};

var timer = function(){

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

$("#rulesubmit").val("免费获取");

};

$(function(){

(function(){

function getValidateCode(){

$("#rulesubmit").val("免费获取(" + secs +")");

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

for (i = 1; i <= secs;i++){

window.setTimeout("update(" + i + ")",i*1000);

}

window.setTimeout("timer()",wait);

}

$("#rulesubmit").click(function(){

getValidateCode();

});

})();

//注意，我这里在测试的时候改成里匿名函数，其实不必这样做也可以实现

//getValidateCode()当作一个单独的函数，在$(function(){//点击按钮执行函数，即上面蓝色部分代码;});

});

</script></span>