ExtJs4 load panel from URL

Question

In ExtJs 3x this code

Ext.getCmp('specific_panel_id').load({
    url:'url_containing_scripts.htm',
    scripts:true, 
    params:{
        something:else
    }
});

works for loading content from URL into a specific panel...

However it does not work in ExtJs 4.x.

Solution

This also work:

Ext.define('EI.view.Viewport',{
extend: 'Ext.container.Viewport',
alias: 'widget.principal',

layout: {
    type: 'vbox',
    align: 'center',
    pack: 'center'
},

items:[
    {
        xtype: 'panel',
        title: 'Mi Documentacion',
        width: 800,
        height: 600,
        border: false,
        autoScroll: true,
        loader: {
            autoLoad:true,
            url :'http://localhost/docs/'
        }
    }

]

});