$(function() {
	$("#video1").css("display", "block");
	$("#m1 > a").addClass("current");
});

function showVideo(num){
	for(var i=1; i<=3; i++){
		var targetAll = "#video" + i;
		$(targetAll).css("display", "none");
		
		var menuAll = "#m" + i + "> a";
		$(menuAll).removeClass("current");
	}
	
	var targetDIv = "#video" + num;
	$(targetDIv).css("display", "block");
	
	var targetMenu = "#m" + num + " > a";
	$(targetMenu).addClass("current");
	
}