if (document.images){
	picA = new Image(); picA,src="../img/navbutton_div_l.gif";
	picB = new Image(); picB,src="../img/navbutton_div_r.gif";
	pic1 = new Image(); pic1.src="../img/navbutton_home_over.gif"; 
	pic2 = new Image(); pic2.src="../img/navbutton_whatisrolfing_over.gif"; 
	pic3 = new Image(); pic3.src="../img/navbutton_about_over.gif"; 
	pic4 = new Image(); pic4.src="../img/navbutton_links_over.gif"; 
}

function NavbuttonRollover(img_id){
var OffImg = "navbutton_"+img_id+".gif";
var OverImg = "navbutton_"+img_id+"_over.gif";
var SwapImg = document.getElementById(img_id);
var SwapImgFileName = SwapImg.src.split('/')[(SwapImg.src.split('/').length)-1];
if (SwapImgFileName == OffImg){
	SwapImg.src = "../img/" + OverImg;
}else if (SwapImgFileName == OverImg){
	SwapImg.src = "../img/" + OffImg;
}
}

function NavbuttonDivs($section){
if(document.getElementById($section).parentNode.parentNode.previousSibling){
	document.getElementById($section).parentNode.parentNode.previousSibling.src='../img/navbutton_div_l.gif';
}
if($section !=='home'){
	document.getElementById($section).parentNode.parentNode.nextSibling.src='../img/navbutton_div_r.gif';
}
}