//Expand or collapse a block

function toggleBB(srcElement, srcArrow) {
	if (srcElement.style.display == "none") {
		srcElement.style.display = "";
		srcArrow.src = "images/expand.gif";
	} 
	else {
		srcElement.style.display = "none"
		srcArrow.src = "images/collapse.gif";
	}
	
}