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

function fixSides() {
	var left = $('sideleft');
	var right = $('sideright');
	
	if(left.offsetHeight>right.offsetHeight) {
		right.style.height = left.offsetHeight+'px';
	}else {
		left.style.height = right.offsetHeight+'px';
	}
	
}


var currSub=0;
function showHide(obj, var_count) {
	var ul = obj.parentNode.getElementsByTagName('ul')[0];
	for (var j=1; j<=var_count; j++){
		var allUls = $('leftNav'+j).getElementsByTagName('ul');
	
		if(currSub!=ul) {
			for (var i=0; i<allUls.length; i++) {
				allUls[i].style.display='none';
			}
		}
	}

	if(ul.style.display=='none') {
		ul.style.display='block';
	}else {
		ul.style.display='none';
	}
	currSub = ul;
	
}