var lastContentYear = 0;

function setHTMLContentYear(y) {
    var ulLinks = document.getElementById("timelineNav").getElementsByTagName("a");
    for (var i = 0; i < ulLinks.length; i++) {
        if (ulLinks[i].childNodes[0].nodeValue == y) {
            ulLinks[i].parentNode.className = "selected";
        } else {
            ulLinks[i].parentNode.className = null;
        }
    }
    if (y != lastContentYear) {
        if (lastContentYear != 0) {
            try {
                document.getElementById("timeline" + lastContentYear).style.display = "none";
            } catch(e) {}
        }
        try {
            document.getElementById("timeline" + y).style.display = "block";
        } catch(e) {}
    }    
    lastContentYear = y;	
}

function setFlashContentYear(y) {
	try {
    	thisMovie("flashMain").setFlashContentYear(y);
    } catch(e) {}
    lastContentYear = y;
}

function setContentYear(y) {
	setHTMLContentYear(y);	
    setFlashContentYear(y);
}
function yearCarousel(el){
	var direction = (el.className == 'forward') ? 'forward' : 'reverse';
	
	var yearList = document.getElementById('timelineNav');
	var yearTags = yearList.getElementsByTagName('LI');
	
	
	for(var i = 0; i < yearTags.length; i++){
		if(yearTags[i].className == 'selected'){
			if(direction == 'forward'){
				
					if(i == yearTags.length -1){
						i = 0 - 1;
					}
					
				
				var year = yearTags[i+1].getElementsByTagName('A')[0].innerHTML;
				setContentYear(year);
				break;
			}
			else{
			if(i == 0){
						i = yearTags.length;
					}
				var year = yearTags[i-1].getElementsByTagName('A')[0].innerHTML;
				setContentYear(year);
				break;
			}
		}
	}
	
	
	
}
function thisMovie(movieName) {
	var isIE = navigator.appName.indexOf("Microsoft") != -1;
	return (isIE) ? window[movieName] : document[movieName];
}