function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

function hideElementsByClass(searchClass) {
	var classElements = new Array();
	classElements = getElementsByClass(searchClass);
	for (i=0; i<classElements.length; i++) {
		classElements[i].style.display = "none";
	}
}

function toggleById(id) {
	tId = "#" + id;
	if (document.getElementById(id).style.display=="none") {
		document.getElementById(id).style.display="block";
	}
	else {
		document.getElementById(id).style.display="none";
	}
}