jquery serialize()

<form>
用户名：<input type="text" name="uname" value="" id="uname" /> 
密码：<input type="password" name="upassword" value="" id="upassword" />
确认密码：<input type="password" name="repassword" value="" id="repassword" /> 
兴趣： 
<input type="checkbox" name="ck" value="0" class="ck" />跑步 
<input type="checkbox" name="ck" value="1" class="ck" />游泳  
<input type="button" value="提交" />
</form>

$(function() {
$(":button").click(function() {
/* var uname=$("#uname").val();
var upassword=$("#upassword").val();
var repassword=$("#repassword").val();
var ck=$(".ck").val();*/

//var param="uname="+uname+"&upasswored="+upassword+"&repassword="+repassword+"&ck="+ck; 

//serialize():一次获取表单所有的数据
var paramStr=$("form").serialize();
alert(paramStr);
})
})