var linkid;
var contentid;

function showSub(linkid,contentid){

	function $(ID){
		return document.getElementById(ID);
	}

	function toggle(element){
			visible(element) ? hide(element) : show(element);
	}

	function visible(element){
		 return element.style.display != 'none';
	}

	function hide(element){
		element.style.display = 'none';
	}

	function show(element){
		element.style.display = '';
	}

	function addClassName(element, className) {
		element.className = element.className + ' ' + className;
	}

	function removeClassName(element, className){
		var classArr = element.className.split(' ');
		classArr = removeFromArray(classArr,className);
		element.className = classArr.join(' ');
	}

	function removeFromArray(array,string){
		var results = Array();
		for (var i = 0, length = array.length; i < length; i++){
			if(array[i] != string){
				results.push(array[i]);
			}
		}
		return results;
	}


	var link = $(linkid)
	var content = $(contentid);

	toggle(content);
	visible(content) ? addClassName(link,'openlink-act') : removeClassName(link,'openlink-act');
}