function ShowCssClass(ShowClass)
{
 	var ShowElement = getElementsByClass(ShowClass);
        
    for (var i = 0, j = ShowElement.length; i < j; i++)
    {
        ShowElement[i].style.display = 'block';
    }
}

function HideCssClass(HideClass)
{
 	var HideElement = getElementsByClass(HideClass);
    
    for (var i = 0, j = HideElement.length; i < j; i++)
    {
        HideElement[i].style.display = 'none';
    }
}

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;
}