function showOnClick(n){
	document.getElementById(n).style.display='block'
}

function hideOnClick(n){
	document.getElementById(n).style.display='none'
}

function switchOnClick(n,m){
	document.getElementById(n).style.display='block'
	document.getElementById(m).style.display='none'
}

function toggleOnClick(n) { 
	n = document.getElementById(n); 
	n.style.display = (n.style.display == 'block') ? 'none' : 'block';
}


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;
}