function newImage(arg) { 
	if (document.images) { 
		rslt = new Image(); rslt.src = arg; return rslt; 
	} 
}

function changeImages() { 
	if (document.images && (preloadFlag == true)) { 
		for (var i=0; i<changeImages.arguments.length; i+=2) { 
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1]; 
		} 
	} 
}

var preloadFlag = false;

function preloadImages() { 
	if (document.images) { 
		site_o = newImage("gx/mj/site-o.gif"); 
		project_o = newImage("gx/mj/project-o.gif"); 
		issues_o = newImage("gx/mj/issues-o.gif"); 
		news_o = newImage("gx/mj/news-o.gif"); 
		comments_o = newImage("gx/mj/comments-o.gif"); 
		preloadFlag = true; 
	} 
}