function navigationMenu(){
	var navObj = document.getElementById("nav");
	var channel = navObj.getElementsByTagName("li");
	for(var i=0;i<channel.length;i++){
		channel[i].onmouseover = function(){
			var child = this.getElementsByTagName("p");
			for(var j=0;j<child.length;j++){child[j].style.display = "block";};
		};
		channel[i].onmouseout = function(){
			var child = this.getElementsByTagName("p");
			for(var j=0;j<child.length;j++){child[j].style.display = "none";};
		};
	};
}
navigationMenu();