var currentDiv = null;

function doSlide(aDiv){
	if (document.getElementById(aDiv).style.visibility == 'hidden'){
		document.getElementById(aDiv).style.visibility = 'visible';
		document.getElementById(aDiv).style.height = 'auto';
		document.getElementById(aDiv).style.display = 'block';
	} else {
		document.getElementById(aDiv).style.visibility = 'hidden';
		document.getElementById(aDiv).style.height = '0';
		document.getElementById(aDiv).style.display = 'none';
	}
	currentDiv = aDiv;
}


var up = new Image();
up.src = "img/site_box_plus.gif";
var down = new Image();
down.src = "img/site_box_minus.gif";

function changeImg(arrow){
	if (document.getElementById(arrow).src == up.src){
		document.getElementById(arrow).src = down.src;
	} else {
		document.getElementById(arrow).src = up.src;
	}
}