dhtmlxTabbar TAB页按钮事件异常
main.html：
<script>
tabbar=new aj("a_tabbar","top");
tabbar.setImagePath("professional/dhtmlxTabbar/codebase/imgs/");
tabbar.enableTabCloseButton(true);
tabbar.loadXML("tabs2.xml");
</script>
tabs2.xml：
<?xml version="1.0"?>
<tabbar hrefmode="ajax-html">
<row>
<tab id="b2" width='100px' selected="1" href="alfa2.html">SCBR 2</tab>
</row>
</tabbar>
alfa2.html ：
<html>
<head>
</head>
<body>
<table width="600">
<tr>
<td width="50%" valign="top">
<div id="gridbox" width="100%" height="250px" style="background-color:white;"></div>
</td>
</tr>
</table>
<hr>
<script>
function btn(){
alert("测试");
}
mygrid = new dhtmlXGridObject('gridbox');
mygrid.setImagePath("imgs/");
mygrid.setHeader("Sales,Book Title Book Title Book Title Book Title,Author,Price,In Store,Shipping,Bestseller,Date of Publication");
mygrid.setInitWidths("50,150,120,80,80,80,80,200")
mygrid.setColAlign("right,left,left,right,center,left,center,center")
mygrid.setColTypes("dyn,ed,ed,price,ch,co,ra,ro");
mygrid.enableEditEvents(false,true,true);
mygrid.getCombo(5).put(2,2);
mygrid.setColSorting("int,str,str,int,str,str,str,date")
mygrid.setColumnColor("white,#d5f1ff,#d5f1ff")
mygrid.init();
mygrid.loadXML("grid1.xml");
</script>
<button onclick="javascript:btn();">
按钮
</button>
</body>
</html>
按上述代码 我的TAB页面正常显示，但点“按钮”时候，却报异常 “缺少对象”
哪位大侠能帮我分析下
<script>
tabbar=new aj("a_tabbar","top");
tabbar.setImagePath("professional/dhtmlxTabbar/codebase/imgs/");
tabbar.enableTabCloseButton(true);
tabbar.loadXML("tabs2.xml");
</script>
tabs2.xml：
<?xml version="1.0"?>
<tabbar hrefmode="ajax-html">
<row>
<tab id="b2" width='100px' selected="1" href="alfa2.html">SCBR 2</tab>
</row>
</tabbar>
alfa2.html ：
<html>
<head>
</head>
<body>
<table width="600">
<tr>
<td width="50%" valign="top">
<div id="gridbox" width="100%" height="250px" style="background-color:white;"></div>
</td>
</tr>
</table>
<hr>
<script>
function btn(){
alert("测试");
}
mygrid = new dhtmlXGridObject('gridbox');
mygrid.setImagePath("imgs/");
mygrid.setHeader("Sales,Book Title Book Title Book Title Book Title,Author,Price,In Store,Shipping,Bestseller,Date of Publication");
mygrid.setInitWidths("50,150,120,80,80,80,80,200")
mygrid.setColAlign("right,left,left,right,center,left,center,center")
mygrid.setColTypes("dyn,ed,ed,price,ch,co,ra,ro");
mygrid.enableEditEvents(false,true,true);
mygrid.getCombo(5).put(2,2);
mygrid.setColSorting("int,str,str,int,str,str,str,date")
mygrid.setColumnColor("white,#d5f1ff,#d5f1ff")
mygrid.init();
mygrid.loadXML("grid1.xml");
</script>
<button onclick="javascript:btn();">
按钮
</button>
</body>
</html>
按上述代码 我的TAB页面正常显示，但点“按钮”时候，却报异常 “缺少对象”
哪位大侠能帮我分析下