//Script para RollOver do menu
$(document).ready(function()
{
	// Preload all rollovers
	$("#nav_topo img").each(function()
	{
		// Set the original src
		rollsrc = $(this).attr("src");
		rollON = rollsrc.replace(/.png$/ig,"_o.png");
		$("<img>").attr("src", rollON);
	});
	
	// Navigation rollovers
	$("#nav_topo a").mouseover(function()
	{
		imgsrc = $(this).children("img").attr("src");
		matches = imgsrc.match(/_o/);
		
		// don't do the rollover if state is already ON
		if (!matches)
		{
			imgsrcON = imgsrc.replace(/.png$/ig,"_o.png"); // strip off extension
			$(this).children("img").attr("src", imgsrcON);
		}
	});

	$("#nav_topo a").mouseout(function()
	{
		$(this).children("img").attr("src", imgsrc);
	});	
});