function opennav(){
	removeClass(document.body,'navClose');
}

function closenav(){
	addClass(document.body,'navClose');
}

function addClass(item, className){
	if(item.tagName){
		if(item.className != className && item.className.search(" " + className + " ")<0){
			if(item.className.length==0){
				item.className = className;
			}else if(item.className.length > className.length){
				if((item.className.substr(0,className.length+1) != (className+" ")) && (item.className.substr(item.className.length-className.length-1,className.length+1) != (" " + className))){
					item.className = item.className + " " + className;
				}
			}else{
				item.className = item.className + " " + className;
			}
		}
	}
}

function removeClass(item, className){
	if(item.tagName){
		if(item.className == className){
			item.className = "";
		}else if(item.className.search(" " + className + " ")>=0){
			item.className = item.className.replace(" " + className + " ","");
		}else if(item.className.substr(0,className.length+1) == (className+" ")){
			item.className = item.className.substr(className.length+1);
		}else if(item.className.substr(item.className.length-className.length-1,className.length+1) == (" " + className)){
			item.className = item.className.substr(0,item.className.length-className.length-1);
		}
	}
}