function deco(){
	var dialog = new YAHOO.widget.Dialog("myDialog",
		{ 
			width: "700px", 
			fixedcenter: true, 
			visible: true, 
			draggable: false,
			close: true,
			underlay:"shadow",
			zIndex: 100
		} 
	); 
	dialog.setHeader("header");
	dialog.setBody("test");
	dialog.render();
}