Question

EXT错误提示ext.viewport is not a constructor

代码如下：
<script type="text/javascript">
Ext.onReady(function(){
var viewPort=new Ext.ViewPort({
layout:'border',
renderTo:Ext.getBody(),
items:[{title:'north',region:'north',split:true,border:true,collapsible:true,height:100,minSize:100,maxSize:120},
{title:'south',region:'south',split:true,border:true,collapsible:true,height:100,minSize:100,maxSize:120},
{title:'east',region:'east',split:true,border:true,collapsible:true,width:120,minSize:120,maxSize:200},
{title:'west',region:'west',split:true,border:true,collapsible:true,width:120,minSize:120,maxSize:200},
{title:'center',region:'center',split:true,border:true,collapsible:true}]
});
});
</script>
求解，谢谢！！！

Answer 1

大小写错误
var viewPort=new Ext.ViewPort({
应该为
var viewPort=new Ext.Viewport({

Js是区分大小写的