var offImgArray = new Array();
var onImgArray = new Array();
var indexArray = new Array(5);

	indexArray[0] = "home"; 
	indexArray[1] = "store"; 
	indexArray[2] = "links"; 		
	indexArray[3] = "updates"; 		
	indexArray[4] = "contactus";


	offImgArray[0] = new Image( 163, 26);
	offImgArray[1] = new Image( 163, 28);
	offImgArray[2] = new Image( 163, 29);
	offImgArray[3] = new Image( 163, 28);
	offImgArray[4] = new Image( 163, 28);

	offImgArray[0].src = "img/p_menu/page_menu_home_off.gif";
	offImgArray[1].src = "img/p_menu/page_menu_store_off.gif";
	offImgArray[2].src = "img/p_menu/page_menu_links_off.gif";
	offImgArray[3].src = "img/p_menu/page_menu_updates_off.gif";
	offImgArray[4].src = "img/p_menu/page_menu_contactus_off.gif";
	
	onImgArray[0] = new Image( 163, 26);
	onImgArray[1] = new Image( 163, 28);
	onImgArray[2] = new Image( 163, 29);
	onImgArray[3] = new Image( 163, 28);
	onImgArray[4] = new Image( 163, 28);
	
	onImgArray[0].src = "img/p_menu/page_menu_home_on.gif";
	onImgArray[1].src = "img/p_menu/page_menu_store_on.gif";
	onImgArray[2].src = "img/p_menu/page_menu_links_on.gif";
	onImgArray[3].src = "img/p_menu/page_menu_updates_on.gif";
	onImgArray[4].src = "img/p_menu/page_menu_contactus_on.gif";

function index( str )
	{
	for( var i = 0; i < indexArray.length; i++ )
		{
		if( indexArray[i] == str  )
			return i;
		}
	return 0;
	}

function imageOn( iName )
	{
	document[ iName ].src = onImgArray[ index(iName) ].src; 
	}

function imageOff( iName )
	{
	document.images[ iName ].src = offImgArray[ index(iName) ].src; 
	}