function collapsiblePanel_collapse(header,contentId,headerClass,contentClass) {
		var element = document.getElementById(contentId);

		className  = element.className;
		
		if(className.indexOf('collapsed') >= 0) {
			element.className = contentClass+' expanded';
			header.className = headerClass+' headerExpanded';
		}
		else {
			element.className = contentClass+' collapsed';
			header.className = headerClass+' headerCollapsed';
		}
	}