How can i close a iframe Popup Window by clic on simple button

[mofallyes]

Sorry for my english,
How can i close this window by Using Javascript Only, I use this Window for registring a Form and i want if the submition is ok to close automaticly the Popup Window.
Thanx for your help

function PopupPageFrame(titre,h,w,page)
{ 
 var winPanel = Ext.getCmp('panelWindowId');
 var winPanel = new Ext.Window(
    {
        title: '<div  style="background-image:url(images/globe-model.png);  background-repeat:no-repeat; background-position:3px 0px;  margin-top:5px; padding-left:25px;  height:16px;">'+titre+'</div>',
        height:h, 
        width: w,
        modal:true,
        moveable:true,
        draggable:true,
        shadow:true,
           maximizable: true,
        resizable:true,
        autoScroll: true,
        collapsible:true,
        iframe:true,
        id:'panelWindowId',
        scope:this,
        plain:true,
        autoScroll: true,
        close :function(){
            winPanel.hide();
            window.location.reload();
            },
        animate:true,
        html: '<iframe style="overflow:auto;width:100%;height:100%;"  frameborder="0"  src="'+ page +'"></iframe>',        
        //autoLoad: {url:''+ page +'', callback: this.initSearch, scope: this},
        bodyStyle :{bgcolor : '#FFFFFF',background:'#FFFFFF'}        
    }
 );
   winPanel.show();
}