function initSiteCredit(ID1, ID2){
	new Effect.Fade(ID2, { duration: 0.3 });
	new Effect.Move(ID1, { x: 0, y: 0, mode: 'absolute', afterFinish:function(obj){ revertSiteCredit.delay(5, ID1, ID2); }});
}

function revertSiteCredit(ID1, ID2){
	new Effect.Move(ID1, { x: -900, y: 0, mode: 'absolute', afterFinish:function(obj){ new Effect.Appear(ID2, { duration: 0.5 }); }});
}

function showDropDownNav(ID1, ID2, Img){
	document.getElementById(ID1).style.display = 'block';
	document.getElementById(ID2).src = 'graphics/' + Img + '_on.gif';
}

function hideDropDownNav(ID1, ID2, Img){
	document.getElementById(ID1).style.display = 'none';
	document.getElementById(ID2).src = 'graphics/' + Img + '.gif';
}


function rollover(img_name, img_src)
   {
   document[img_name].src = "../images/"+img_src;
   }