getSelectionModel设置为不可以用状态，也就是成灰色的那种

[jiafeng_lee]

var powerBtn = Ext.get('power-update');
powerBtn.on('click', function(){
var strAll=new Array();
var POWERIDS = new Array();
var roleL = grid_role.getSelectionModel().getSelections(); //获取权限 复选框模型
if(roleL.length==0){
return;
}
var powerL = grid_power.getSelectionModel().getSelections(); //获取权限 复选框模型
for(var i=0;i<roleL.length;i++)
{
if(roleL[i].data.ROLEID!=undefined&&roleL[i].data.ROLEID!=""){
POWERIDS+=roleL[i].data.ROLEID+";";
for(var j=0;j<powerL.length;j++)
{
strAll.push("'"+roleL[i].data.ROLEID+"','"+powerL[j].data.POWERID+"'"+";");
}
}
}

var str=strAll.join("");
if(str==""){
str="remove";
}
Ext.Ajax.request({
url: getRootPath()+'/RP_powerUpdate.action?str='+str+'&POWERIDS='+POWERIDS,
success: function(response,result){
alert(response.responseText);
},
failure:function(){
Ext.Msg.alert('提示','获取数据出错！');
}
});

});