function toTop(layer, action, z){
		var lref;

		if(document.getElementById && (lRef=document.getElementById(layer))){

			lRef.style.visibility=action?'visible':'hidden';
			lRef.style.zIndex=z;


		}
	}
				YAHOO.namespace("demoForm.container");
				YAHOO.namespace("startup.container");


				function init() {

					YAHOO.demoForm.container.demoForm = new YAHOO.widget.Overlay("demoForm",
					{visible:false,effect:[{effect:YAHOO.widget.ContainerEffect.FADE,duration:0.5}],fixedcenter:true, modal:true } );

					YAHOO.demoForm.container.demoForm.render();
					
					YAHOO.util.Event.addListener("popDemoForm", "click", YAHOO.demoForm.container.demoForm.show, YAHOO.demoForm.container.demoForm, true);
					YAHOO.util.Event.addListener("popDemoFormHeader", "click", YAHOO.demoForm.container.demoForm.show, YAHOO.demoForm.container.demoForm, true);
					YAHOO.util.Event.addListener("popDemoFormImage", "click", YAHOO.demoForm.container.demoForm.show, YAHOO.demoForm.container.demoForm, true);
					YAHOO.util.Event.addListener("popDemoFormImage2", "click", YAHOO.demoForm.container.demoForm.show, YAHOO.demoForm.container.demoForm, true);
					YAHOO.util.Event.addListener("hideDemoForm", "click", YAHOO.demoForm.container.demoForm.hide, YAHOO.demoForm.container.demoForm, true);
					
					YAHOO.startup.container.startup = new YAHOO.widget.Overlay("startup",
					{visible:false,effect:[{effect:YAHOO.widget.ContainerEffect.FADE,duration:0.5}],fixedcenter:true, modal:true } );

					YAHOO.startup.container.startup.render();
					
					YAHOO.util.Event.addListener("popStartUp", "click", YAHOO.startup.container.startup.show, YAHOO.startup.container.startup, true);
					YAHOO.util.Event.addListener("hideStartUp", "click", YAHOO.startup.container.startup.hide, YAHOO.startup.container.startup, true);


				}

				YAHOO.util.Event.addListener(window, "load", init);


<!-- Sub menu display -->


function displaySubMenu(tab){

	subMenu = document.getElementById('submenu' + tab);
	subMenu.style.display = 'block';
	subMenu.style.visibility = 'visible';
}


function hideSubMenu(tab){
			
	subMenu = document.getElementById('submenu' + tab);
	subMenu.style.display = 'none';
	subMenu.style.visibility = 'hidden';
}