// JavaScript Document Style Functions

function addClass(el, className){
	currentClassName = el.className;
    el.className = currentClassName+" "+className;
}

function removeClass(el, className){
	var currentClassName = el.className;
	var newClassName = currentClassName.substr(0, currentClassName.length-className.length);
	el.className = newClassName;
}

function showHide(id){
	el = document.getElementById(id);
	
	if(el.style.display == '')
		el.style.display = 'none';
	else
		el.style.display = '';
}