var nowon=1;
var next_num=2;
var hold=2;

$(function(){

	$('#mainv_img li').each(function(){
		$(this).css("opacity","0");
	});

	$('#mainv_img li:first-child').css("opacity","1");

//	if($('#mainv_img li img')){
		setInterval("chMainv();",8000);
//	}

	$('#mainv_btn1').mouseover(function(){
		mainvbtns('1');
		nowon=1;
		hold=1;
	});
	$('#mainv_btn1').mouseout(function(){
		hold=2;
	});
	$('#mainv_btn2').mouseover(function(){
		mainvbtns('2');
		nowon=2;
		hold=1;
	});
	$('#mainv_btn2').mouseout(function(){
		hold=2;
	});
	$('#mainv_btn3').mouseover(function(){
		mainvbtns('3');
		nowon=3;
		hold=1;
	});
	$('#mainv_btn3').mouseout(function(){
		hold=2;
	});

});



function chMainv(){
	if(hold != 1){
		var next_num=nowon+1;
		if(next_num > 3){
			next_num=1;
		}
		mainvbtns(next_num);
		nowon=next_num;
	}
}



function mainvbtns(Div){
	var hideNum=nowon-1;
	if(hideNum > 3){
		hideNum=0;
	}
	var showNum=Div-1;
	if(showNum > 3){
		showNum=0;
	}
	var link_data="";
	for(var i=1;i<4;i++){
		var divName="#mainv_btn"+i;
		var imgName="mainv_btn"+i;
		var itype="_1";
		if(Div == i){
			itype="_2";
			link_data=$(divName).parent().attr("href");
		}
		var img_p_line="img/"+imgName+itype+".png";
		$(divName).attr("src",img_p_line);

	}
	if(nowon != Div){
		var elements=$('#mainv_img ul').children();
		$(elements[hideNum]).animate({ 
			opacity: 0
		}, 800 );
		$(elements[showNum]).animate({ 
			opacity: 1
		}, 800 );
	}
}



function mainvlink(){
	var divName="#mainv_btn"+nowon;
	var link_data=$(divName).parent().attr("href");
	location.href=link_data;
}