function ShowHideElement(sObjectId, classe) {
	var oObj = document.getElementById(sObjectId);
	if (oObj.style.display=='block') oObj.style.display='none';
	else {
		HideByClass(classe);
		oObj.style.display='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;
}

function HideByClass(classe) {
  	var oggetti = getElementsByClass(classe);
		for (var i=0; i<(oggetti.length); i++) {
			oggetti[i].style.display='none';
  		}
}