// JavaScript Document
function swapNavImages(navItem){
	for (var i = 0; i<navItem.childNodes.length; i++){
		if (navItem.childNodes[i].tagName == 'IMG'){
			var fullSRC = navItem.childNodes[i].src;
			var cutSRC = fullSRC.substring(0, fullSRC.indexOf(".gif"));
			if (cutSRC.indexOf("_over") == -1){
				navItem.childNodes[i].src = cutSRC + "_over.gif";
			}else{
				navItem.childNodes[i].src = cutSRC.substring(0, cutSRC.indexOf("_over")) + ".gif"; 
			}
		}	
	}
}