if (document.images) {
    var title2 = new Image();
    title2.src  = "nav_images/title2.gif";
    var title2_on = new Image();
    title2_on.src  = "nav_images/title2_on.gif";
    var title3 = new Image();
    title3.src  = "nav_images/title3.gif";
    var title3_on = new Image();
    title3_on.src  = "nav_images/title3_on.gif";
    var title4 = new Image();
    title4.src  = "nav_images/title4.gif";
    var title4_on = new Image();
    title4_on.src  = "nav_images/title4_on.gif";
    var title5 = new Image();
    title5.src  = "nav_images/title5.gif";
    var title5_on = new Image();
    title5_on.src  = "nav_images/title5_on.gif";
}
  
function over(imagename,orig) {
    if (document.images)
	if (eval(imagename + "_on.complete"))
		{
		document.images[orig].src = eval( imagename + "_on.src" );
		}
}

function out(imagename,orig) {
    if (document.images)
	{
	if (eval(imagename + ".complete"))
		{
		document.images[orig].src = eval( imagename + ".src" );
		}
	}
}