function MM_preloadImages() { //v3.0
	 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	 var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
	 if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
		
function MM_swapImgRestore() { //v3.0
	 var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
		
function MM_findObj(n, d) { //v4.01
	 var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
	 d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
	 if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	 for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
	 if(!x && d.getElementById) x=d.getElementById(n); return x;
}
		
function MM_swapImage() { //v3.0
	 var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
	 if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

var ZebraZeroMenu = {
	configureMenu: function(buttonId) {
		var img = document.getElementById(buttonId);
		var a = img.parentNode;
		var th = a.parentNode;
		var newLink = document.createElement('a');
		newLink.href = a.href; 
		var newImg = document.createElement('img');
		newImg.id = img.id;
		newImg.name = img.name;
		newImg.src = ZebraZeroMenu.pickImg(buttonId);
		newLink.appendChild(newImg);
		th.replaceChild(newLink, a);
	},
	pickImg: function(buttonId) {
		if (buttonId == 'btn_home2') {
			return 'images/btn_menu01_home_over.gif';
		}
		else if (buttonId == 'btn_franquia2') {
			return 'images/btn_menu05_franquia_over.gif';
		}
		else if (buttonId == 'btn_empresa2') {
			return 'images/btn_menu02_empresa_over.gif';
		}
		else if (buttonId == 'btn_produtos2') {
			return 'images/btn_menu03_produtos_over.gif';
		}
		else if (buttonId == 'btn_lojas2') {
			return 'images/btn_menu04_lojas_over.gif';
		}
		else if (buttonId == 'btn_contato2') {
			return 'images/btn_menu07_contato_over.gif';
		}
	}
};

window.onload = function() {
	//alert('preloading..');
	MM_preloadImages('images/btn_menu01_empresa_over.gif', 
			'images/btn_menu02_empresa_over.gif',
			'images/btn_menu03_produtos_over.gif',
			'images/btn_menu04_lojas_over.gif',
			'images/btn_menu05_franquia_over.gif',
			'images/btn_menu06_zebra_night_over.gif',
			'images/btn_menu07_contato_over.gif');
}