var contact = function(){

    var dialog, showBtn;
	
    return {
        init : function(){
             showBtn = getEl('show-dialog-btn');
             showBtn.on('click', this.showDialog, this, true);

        },
        
        showDialog : function(){
            if(!dialog){ // lazy initialize the dialog and only create it once
                dialog = new YAHOO.ext.BasicDialog("contact-dlg", { 
                        modal:true, autoTabs:true,
                        width:840, height:490,
						/*width: (Screen.Width - dialog.Width) / 2, 
						height:(Screen.Height - dialog.Height) / 2,*/

                        shadow:true, 
                        minWidth:840, minHeight:490,
                        proxyDrag: true
                });
                dialog.addKeyListener(27, dialog.hide, dialog);
                dialog.addButton('Sluiten', dialog.hide, dialog);
               			
            }
            dialog.show(showBtn.dom);			 
        }
    };
}();

YAHOO.ext.EventManager.onDocumentReady(contact.init, contact, true);