/* left menu */
function SHleftmenu() {
	var menuBtn = document.getElementById('columnLeft').getElementsByTagName('H3');
	for (var i = 0; i < menuBtn.length; i++) {
		menuBtn[i].onclick = function() {
			if (this.parentNode.className == 'menu hide') {
				this.parentNode.className = 'menu show';
			} else {
				this.parentNode.className = 'menu hide';
			}			
		}
	}
}

/* show/hide blocks */
function SHblock(id) {
	var blockObj = document.getElementById(id);
	blockObj.className = (blockObj.className == 'hide') ? 'show' : 'hide';
}

window.onload = function() {
	SHleftmenu();
}