function iniciaMenu(){
	jQuery("#iframe_div_ie6").remove();
	jQuery("#menu > li > a").removeClass("active_menu").parent().find(".submenu").css("left", "-9999em").show();
}

function mostraMenu(obj){
	var obj = jQuery("#"+obj);
	
	obj.find("> a").addClass("active_menu");
	obj.find(".submenu").css("left","");
	
	objSubMenu = obj.find(".submenu");
	
	//adaptação tecnica para ie
	if(jQuery.browser.version <= 6 && jQuery.browser.msie)
	{
		var objIframe = jQuery("<iframe id=\"iframe_div_ie6\" src=\"\" scrolling=\"no\" frameborder=\"0\" style=\"position:absolute;border:none;display:block;\"></iframe>");

		var objPosition = objSubMenu.position();
		
		objIframe
		.width(objSubMenu.outerWidth(true))
		.height(objSubMenu.outerHeight(true))
		.css("top", objPosition.top + "px")
		.css("left", objPosition.left + "px")
		.css("z-index", objSubMenu.css("z-index"));
		
		objSubMenu.before(objIframe);
	}
}