jquery 点击应用

1. 放大／缩小网页字体大小

   
   

<script type="text/javascript">
    $(function(){
        $("span").click(function(){
            var thisEle = $("#para").css("font-size"); 
            var textFontSize = parseInt(thisEle , 10);
            var unit = thisEle.slice(-2); //获取单位
            var cName = $(this).attr("class");
            if(cName == "bigger"){
                   if( textFontSize <= 22 ){
                        textFontSize += 2;
                    }
            }else if(cName == "smaller"){
                   if( textFontSize >= 12  ){
                        textFontSize -= 2;
                    }
            }
            $("#para").css("font-size",  textFontSize + unit);
        });
    });
  </script>
<div class="msg">
    <div class="msg_caption">
        <span class="bigger" >放大</span>
        <span class="smaller" >缩小</span>
    </div>
    <div>
        <p id="para">
        This is some text. This is some text. This is some text. This is some text. This
        is some text. This is some text. This is some text. This is some text. This is some
        text. This is some text. This is some text. This is some text. This is some text.
        This is some text. This is some text. This is some text. This is some text. This
        is some text. This is some text.
        </p>
    </div>
</div>

网页换皮肤／背景

<script type="text/javascript">
        //<![CDATA[
        $(function(){
            var $li =$("#skin li");
            $li.click(function(){
                switchSkin( this.id );
            });
            var cookie_skin = $.cookie( "MyCssSkin");  //获取cookie的值
            if (cookie_skin) {
                switchSkin( cookie_skin );
            }
        });
        function switchSkin(skinName){
                 $("#"+skinName).addClass("selected")                 //当前<li>元素选中
                              .siblings().removeClass("selected");  //去掉其它同辈<li>元素的选中
                $("#cssfile").attr("href","css/"+ skinName +".css"); //设置不同皮肤
                $.cookie( "MyCssSkin" ,  skinName , { path: '/', expires: 10 });
        }
        //]]>
</script>
<ul id="skin">
        <li id="skin_0" title="灰色" class="selected">灰色</li>
        <li id="skin_1" title="紫色">紫色</li>
        <li id="skin_2" title="红色">红色</li>
        <li id="skin_3" title="天蓝色">天蓝色</li>
        <li id="skin_4" title="橙色">橙色</li>
        <li id="skin_5" title="淡绿色">淡绿色</li>
    </ul>

    <div id="div_side_0">
        <div id="news">
            <h1 class="title">时事新闻</h1>
        </div>
    </div>
    <div id="div_side_1">
        <div id="game">
            <h1 class="title">娱乐新闻</h1>
        </div>
    </div>