onload = function() {
	
	// Resize sidebar
	var contentSize = document.getElementById("content").offsetHeight,
		signboardSize = document.getElementById("signboard");
	if(contentSize > 825) {
		signboardSize.style.height = (contentSize-94)+'px';
	}
	
	// Cool menu item bg
	var selItem = document.getElementById("selected"),
		itemBg = document.createElement("span");
	itemBg.setAttribute("class", "arrow");
	selItem.appendChild(itemBg);

}