var sLastSubMenu
var sIntervalID

sLastSubMenu = ''
sIntervalID = ''

function hlOn(sName, sImg) {
	document[sName].src = sImg
}

function ShowSubMenu(sName) {

	if (sIntervalID != '') {
		clearTimeout(sIntervalID)
	}

	sLastSubMenu = sName
	document.getElementById("about_sub").style.visibility = "Hidden"
	document.getElementById("port_sub").style.visibility = "Hidden"
	document.getElementById("news_sub").style.visibility = "Hidden"
	document.getElementById("services_sub").style.visibility = "Hidden"
	
	if (sName != "") {
		document.getElementById(sName + "_sub").style.visibility = "Visible"
	}

}

function HideSubMenu() {
	if (sLastSubMenu != '') {
		document.getElementById(sLastSubMenu + "_sub").style.visibility = "Hidden"
		sLastSubMenu = ''
		sIntervalID = ''
	}
}


function AutoHideSubMenu() {
	sIntervalID = self.setTimeout('HideSubMenu()', 750)
}

function NewWin(sUrl) {
	window.open(sUrl,'Article','')
}

if (document.images) {
	
	var aImagesMain = new Array(
		"images/nav_about2.gif"
		,"images/nav_about_sub12.gif"
		,"images/nav_about_sub22.gif"
		,"images/nav_about_sub32.gif"
		,"images/nav_about_sub42.gif"
		,"images/nav_portfolio2.gif"
		,"images/nav_portfolio_sub12.gif"
		,"images/nav_portfolio_sub22.gif"
		,"images/nav_portfolio_sub32.gif"
		,"images/nav_portfolio_sub42.gif"
		,"images/nav_portfolio_sub52.gif"
		,"images/nav_services2.gif"
		,"images/nav_service_sub12.gif"
		,"images/nav_service_sub22.gif"
		,"images/nav_service_sub32.gif"
		,"images/nav_news2.gif"
		,"images/nav_news_sub12.gif"
		,"images/nav_news_sub22.gif"
		,"images/nav_contact2.gif"
		,"images/nav_exploration2.gif"
		,"images/nav_home2.gif");
	
	for (i=0;i<aImagesMain.length;i++) {
		 eval("j" + i  + " = new Image()");          
         eval("j" + i + ".src = aImagesMain[i]");    
	}
}