jquery实现全选反选功能---兰

<div id="checkAndInverCheck">
<p style="text-align:center; padding-top:15px"> 选择喜欢的兰花品种：</br>
<input type="checkbox" value="蕙兰">蕙兰
<input type="checkbox" value="建兰">建兰</br>
<input type="checkbox" value="寒兰">寒兰
<input type="checkbox" value="墨兰">墨兰</br>
<input type="checkbox" value="春兰">春兰
<input type="checkbox" value="莲瓣兰">莲瓣兰

</div>
<p style="text-align:center; padding-top:15px">
<input type="button" value="全选" name="ay_check" id="ay_check_all"/>
<input type="button" value="反选" name="ay_check" id="ay_check_invert"/>
</p> 

<script type="text/javascript">
//全选
$("input[name=‘ay_check‘]").bind("click",function(){
    var btn_id = $(this).attr("id");
    if(btn_id){
        //点击全选按钮
        if(btn_id == "ay_check_all"){
            var inputs = $("#checkAndInverCheck input");
            if(inputs.length == 0){
                alert("div下没<input>元素，你想全选啥？");
            }else{
                for(var i in inputs){
                    inputs[i].checked=(inputs[i].checked)?"checked":"checked";
                }
            }
        //点击反选按钮
        }else if(btn_id == "ay_check_invert"){
            var inputs = $("#checkAndInverCheck input");
            if(inputs.length == 0){
                alert("div下没<input>元素，你想反选啥？");
            }else{
                for(var i in inputs){
                    inputs[i].checked=(inputs[i].checked)?"":"checked";
                }
            }　
        }else{
            alert("wrong！！！");
        }
    }

});
//全选
function checkAll(){
    var inputs = $("#checkAndInverCheck input");
    if(inputs.length == 0){
        alert("div下没<input>元素，你想全选啥？");
　　}else{
        for(var i in inputs){
            inputs[i].checked=(inputs[i].checked)?"checked":"checked";
        }
    }
} 

//反选
function invertCheck(){
    var inputs = $("#checkAndInverCheck input");
    if(inputs.length == 0){
        alert("div下没<input>元素，你想反选啥？");
    }else{
        for(var i in inputs){
            inputs[i].checked=(inputs[i].checked)?"":"checked";
        }
    }　
}