mouseIsOverNext=false
mouseIsOverBack=false

function ableToNav( upOrDown ) {
			//alert(newsIdList.indexOf(19))

	targetIndex = newsIdList.indexOf(currentNewsId) + upOrDown
	return targetIndex >= 0 && targetIndex < newsIdList.length
}

function newsNav( upOrDown ) {

	if ( ableToNav( upOrDown ) ){
		newsJump(newsIdList[ newsIdList.indexOf(currentNewsId) + upOrDown ])
	}
}

function newsJump( newsId ) {
	currentNewsBlock = document.getElementById('newsitem'+currentNewsId)
	targetNewsBlock = document.getElementById('newsitem'+newsId)
	currentNewsBlock.style.display='none'
	newDisplayValue = navigator.appName == "Microsoft Internet Explorer" ? "block" : "table"
	targetNewsBlock.style.display=newDisplayValue
	currentNewsId = newsId
	setNewsButtons()
}

function setNewsButtons() {
	//alert(mouseIsOverBack+"/"+mouseIsOverNext)
	if ( ! ableToNav(1) ) {
		MM_swapImage('newsnx','','images/newsnx-off.gif',1)
	} else {
		imgSrc = mouseIsOverNext ? 'images/newsnx-r.gif' : 'images/newsnx.gif'
		MM_swapImage('newsnx','',imgSrc,1)
	}
	
	
	if ( ! ableToNav(-1) ) {
		MM_swapImage('newsbk','','images/newsbk-off.gif',1)
	} else {
		imgSrc = mouseIsOverBack ? 'images/newsbk-r.gif' : 'images/newsbk.gif'
		MM_swapImage('newsbk','',imgSrc,1)
	}
}


function newsNextOver() {
	mouseIsOverNext=true
	setNewsButtons()
}
function newsNextOut() {
	mouseIsOverNext=false
	setNewsButtons()

}
function newsBackOver() {
	mouseIsOverBack=true
	setNewsButtons()
}

function newsBackOut() {
	mouseIsOverBack=false
	setNewsButtons()
}