(document.getElementById) ? dom = true : dom = false;

function showIt(featureNum) {
	if (dom) {
		document.getElementById('hs_feature_1').style.visibility='hidden';
		document.getElementById('hs_feature_2').style.visibility='hidden';
		document.getElementById('hs_feature_3').style.visibility = 'hidden';
		document.getElementById('hs_feature_4').style.visibility = 'hidden';
		document.getElementById('hs_feature_5').style.visibility = 'hidden';
		document.getElementById('hs_highlight_1').style.visibility='hidden';
		document.getElementById('hs_highlight_2').style.visibility='hidden';
		document.getElementById('hs_highlight_3').style.visibility = 'hidden';
		document.getElementById('hs_highlight_4').style.visibility = 'hidden';
		document.getElementById('hs_highlight_5').style.visibility = 'hidden';
		document.getElementById('hs_feature_'+featureNum).style.visibility='visible';
		document.getElementById('hs_highlight_'+featureNum).style.visibility='visible';
	}
	if (document.layers) {
		document.layers['hs_feature_1'].visible='hide';
		document.layers['hs_feature_2'].visible='hide';
		document.layers['hs_feature_3'].visible = 'hide';
		document.layers['hs_feature_4'].visible = 'hide';
		document.layers['hs_feature_5'].visible = 'hide';
		document.layers['hs_highlight_1'].visible='hide';
		document.layers['hs_highlight_2'].visible='hide';
		document.layers['hs_highlight_3'].visible = 'hide';
		document.layers['hs_highlight_4'].visible = 'hide';
		document.layers['hs_highlight_5'].visible = 'hide';
		document.layers['hs_feature_'+featureNum].visible='show';
		document.layers['hs_highlight_'+featureNum].visible='show';
	}
	stopCount()
}

var c=0;
var t;
var timer_is_on=0;

function timedCount() {
	if (c==0) {
		showIt(1);
		c=1;
	} else if (c==1) {
		showIt(2);
		c=2;
	} else if (c==2) {
		showIt(3);
		c=3;
	} else if (c==3) {
		showIt(4);
		c=4;
	} else if (c==4) {
		showIt(5);
		c=0;
	}
	t=setTimeout("timedCount()",8000);
}

function doTimer() {
	if (!timer_is_on) {
		timer_is_on=1;
		timedCount();
	}
}

function stopCount() {
	clearTimeout(t);
	timer_is_on=0;
}

window.onload = function() {
	doTimer();
}