var index = 0;
var div_num = 7;
var getTime = 5000;

	function DisplayMenu(idx) { 
		index = idx;
		for (z=1; z<=div_num; z++){ 
			var show_tab  = document.getElementById("show_tab" + z);
			var show_menu = document.getElementById("show_menu" + z);
			if(index == z){
			show_tab.style.display = "";
			show_menu.style.display = "";
			}else{
			show_tab.style.display = "none";
			show_menu.style.display = "none";
			}
		}
	}

	var timer = null;
	function setTimer(){ //타이머 실행함수
		var argLength = arguments[0].length;
		timer = setInterval( function(){
		DisplayMenu(index=index<argLength? ++index:1);
		},getTime);
	}

	function setOnMouse(){ //마우스 이벤트를 다루는 함수
		arg = arguments[0];
		for (var k=0; k<arg.length; k++){
			arg[k].onmouseover = function(){
			if(timer) clearInterval(timer);
			}
			arg[k].onmouseout = function(){ 
			setTimer(arg);
			}
		}
	}
	 window.onload = function(){
		var obj = [];
			obj.push( document.getElementById('show_menu1') );
			obj.push( document.getElementById('show_menu2') );
			obj.push( document.getElementById('show_menu3') );
			obj.push( document.getElementById('show_menu4') );
			obj.push( document.getElementById('show_menu5') );
			obj.push( document.getElementById('show_menu6') );
			obj.push( document.getElementById('show_menu7') );
			setTimer(obj); 
			setOnMouse(obj);
	}