纯JavaScripst的全选、全不选、反选【转】

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<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>【JavaScripst效果】全选、全不选、反选</title>

    <style>

        h2, ul, p { margin: 0; padding: 0; }

        ul { list-style: none; }

        h2 { font-size: 100%; text-indent: 5px; }

        input { vertical-align: -2px; *vertical-align: -1px; }

        .m-box { width: 400px; border: 1px #666 solid; margin: 0 auto; font: 12px/30px 'microsoft yahei'; }

        .m-box .hd,.m-box .ft { background-color: #ccc; }

        .m-box .bd { overflow-x: hidden; overflow-y: auto; position: relative;  height: 120px; }

        .m-box .bd li label { display: block; height: 30px; vertical-align: top; }

    </style>

</head>

<body>

<div class="m-box">

    <h2 class="hd">选择列表</h2>

    <ul class="bd" id="j-itemBox">

        <li><label><input type="checkbox" name="item" value="1"/>选项1</label></li>

        <li><label><input type="checkbox" name="item" value="2"/>选项2</label></li>

        <li><label><input type="checkbox" name="item" value="3"/>选项3</label></li>

        <li><label><input type="checkbox" name="item" value="4"/>选项4</label></li>

        <li><label><input type="checkbox" name="item" value="5"/>选项5</label></li>

        <li><label><input type="checkbox" name="item" value="6"/>选项6</label></li>

        <li><label><input type="checkbox" name="item" value="7"/>选项7</label></li>

        <li><label><input type="checkbox" name="item" value="8"/>选项8</label></li>

        <li><label><input type="checkbox" name="item" value="9"/>选项9</label></li>

        <li><label><input type="checkbox" name="item" value="10"/>选项10</label></li>

    </ul>

    <p class="ft"><label><input type="checkbox" id="j-checkAll"/>全选</label>&nbsp;<a href="javascript:void(0);" id="j-checkReverse">反选</a>&nbsp;<a href="javascript:void(0);" id="j-checkOk">确定</a></p>

</div>

<script>

    /* by [email protected] */

    function Check(options){

        this.oItemsBox = options.oItemsBox;

        this.aItems = options.aItems;

        this.oCheckAll = options.oCheckAll;

        this.oCheckReverse = options.oCheckReverse;

        this.oCheckOk = options.oCheckOk;

    }

    Check.prototype = {

        init : function(){

            var that = this;

            //根据选项更新全选

            this.oItemsBox.onclick = function(e){

                var ev = e || window.event, target = ev.target || ev.srcElement;

                if(target.tagName.toLowerCase() === "input"){

                    that.checkReverse(that);

                }

            };

            //全选操作

            this.oCheckAll.onclick = function(){

                that.checkAll();

            };

            //反选操作

            this.oCheckReverse.onclick = function(){

                that.checkReverse(that, true);

            };

            //确定

            this.oCheckOk.onclick = function(){

                var test = that.checkReverse(that);

                alert("您选择了value是：【"+test+"】的选项！");

            };

        },

        //全选/全不选

        checkAll : function(){

            for(var i = 0, len = this.aItems.length; i < len; i++){

                this.aItems[i].checked = this.oCheckAll.checked;

            }

        },

        //根据选项更新全选

        checkReverse : function(that, isReverse){

            for(var i = 0, n = 0, arr = [], len = that.aItems.length; i < len; i++){

                if(isReverse){

                    that.aItems[i].checked = !that.aItems[i].checked;

                }

                if(that.aItems[i].checked){n++;arr.push(that.aItems[i].value)}

            }

            that.oCheckAll.checked = len == n;

            return arr;

        }

    };

    //实例化

    var myCheck = new Check({

        oItemsBox : document.getElementById('j-itemBox'),

        aItems : document.getElementsByName('item'),

        oCheckAll : document.getElementById('j-checkAll'),

        oCheckReverse : document.getElementById('j-checkReverse'),

        oCheckOk : document.getElementById('j-checkOk')

    });

    myCheck.init();

</script>

</body>

</html>
JavaScripst

纯JavaScripst的全选、全不选、反选 【转】

纯JavaScripst的全选、全不选、反选【转】
