function setArrow(a){ // -360, -255, -135, -15, 95, 190, 305
	document.getElementById('arrow').style.marginLeft = a + 'px';
	document.getElementById('arrow').style.visibility = 'visible';
	/*document.getElementById('content').style.height = h + 'px';
	document.getElementById('main').style.height = h + 50 + 'px';*/
}
function rollOver(x){
	document.getElementById('smear').style.marginLeft = x + 'px';
	document.getElementById('smear').style.visibility = 'visible';
}
function rollOff(){
	document.getElementById('smear').style.visibility = 'hidden';
}
function tips(div,mode){
	if(mode == 'show'){
		for(i=1; i<4; i++){ // hide all first so only ever one open
			document.getElementById('t' + i).style.visibility = "hidden";
		}
		document.getElementById(div).style.visibility = "visible";
	}
	else if(mode == 'hide'){
		document.getElementById(div).style.visibility = "hidden";
	}
}