var iPath  = 'images/nav/';
var iExt   = 'gif';
var suffix = new Array('off', 'over');

function preLoad(){
	if(document.images){
		var argLen = arguments.length;
		for(var i = 0; i < argLen; i++){
			var arg = arguments[i];
			var sufLen = suffix.length;
			for(j = 0; j < sufLen; j++){
				var suf = suffix[j]
				self[arg + '_' + suf] = new Image();
				self[arg + '_' + suf].src = iPath + arg + '_' + suf + '.' + iExt;
			}
		}
	}
}

function rollOver(iName, iState){
	if(document.images && self[iName + '_' + iState]){
		document.images[iName].src = self[iName + '_' + iState].src;
	}
	return true;
}

function preloadNav(){
	preLoad('news','music','gear','orders','contact');
}