var nav_buttons=Array('nav1','nav2','nav3','nav4','nav5');
var nav_images=Array(Array(),Array());

function exp_Preload()
{
	for (i=0;i<nav_buttons.length;i++)
	{
		var b=nav_buttons[i];
		nav_images[0][b]=new Image();nav_images[0][b].src='/design/'+b+'.jpg';
		nav_images[1][b]=new Image();nav_images[1][b].src='/design/'+b+'m.jpg';
	};
}

function exp_Rollover(id,up)
{
	var img=document.images[id];
	if (img) img.src=nav_images[up][id].src;
}

exp_Preload();