<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
    <head> 
        <meta http-equiv="Content-Type" content="text/html; charset=gbk" /> 
        <title>StripingTable</title> 
        <script type="text/javascript" src="http://www.wozaishuo.com.cn/example/jquery/jquery-1.2.1.js"></script> 
        <script type="text/javascript"> 
        <!-- 
            $(document).ready(function(){ }); 
             
            //隐藏和显示div层 
            function changeDisplay(){ 
                var helloDivObj = $("#helloDiv"); 
                var buttonObj = $("#btnDisplay"); 
                var val = buttonObj.attr("value"); 
                if(val=="隐藏"){ 
                    helloDivObj.hide(); 
                    buttonObj.attr("value","显示"); 
                }else{ 
                    helloDivObj.show(); 
                    buttonObj.attr("value","隐藏"); 
                } 
                          // var helloDivObj = $("#helloDiv").toggle(); //甚至只需要这一句搞定切换隐藏与显示             
    } 
        --> 
        </script> 
    </head> 
    <body> 
        <div class="title_a">一、JQuery核心库</div> 
        <div class="title_b">(一)、jQuery(e xpression,[context])用法!</div> 
        <div class="title_c">3.jQuery(elements)</div> 
        将一个或多个DOM元素转化为jQuery对象。这个函数也可以接收XML文档和Window对象（虽然它们不是DOM元素）作为有效的参数。<p></p> 
         
        <input id="btnDisplay" type="button" value="隐藏"
        <div id="helloDiv"> 
        Hello,everyone<p></p> 
        Hello,everytwo<p></p> 
        Hello,everythree<p></p> 
        </div> 
    </bdoy> 
</html>