根据文本框输入的内容匹配gridpanel中的数据，查找到第一项就break

var searchButton = new Ext.Button( {
renderTo : 'businessUserQuery',
text : "<span style='font-size:12px'>查询</span>",
iconCls : 'addx',
autoHeight : true,
width : 60,

bodyStyle : 'padding: 5px',
handler : function() {
//标志位，查找到第一个，就退出遍历
var flag = 0;
var searchTxt = search.getValue();
for(var i = 0; i < store.getCount();i++)
{
//用输入内容searchTxt创建正则表达式对象，忽略大小写。
var re = new RegExp(searchTxt,"ig");
var num = String(store.getAt(i).get("number"));
//在字符串num中查找匹配。
var r = num.match(re);
if(r != null)
{
//找到匹配项就把这一行选中
userGrid.getSelectionModel().selectRow(i);
break;
}
}
}
});

var search = new Ext.form.TextField( {
renderTo : 'businessUserSearch',
Height : 40,
width : 120,
bodyStyle : 'padding: 5px;',
handler : function() {

}
});

var userData = new Array();
var store = new Ext.data.ArrayStore({
fields: [
{
name: 'number'
}
]
});
store.loadData(userData);

var cm = new Ext.grid.ColumnModel({
columns:[
userGrid_sm,
{
id:"number",
header:"用户号码",
width: 200,
align:'center',
dataIndex:"number",
editor: new Ext.form.NumberField({
allowBlank: false,
minLength:1,
maxLength:15
})
}]});

var userGrid = new Ext.grid.EditorGridPanel({
sm:userGrid_sm,
cm:cm,
height:380,
width: 1081,
frame: true,
store:store
});
userGrid.render('businessEditorGrid');