$(function(){
	var ppt_count = $('.home_ad_banner a').length;	//幻灯总数
	var play_i = 0;						//当前播放序
	
	//生成页码
	for(var pi=0; pi<ppt_count; pi++){
		if(pi==0){
			$('.home_ad_page').append('<a href="javascript:;" class="over" pi="'+pi+'"></a>');
		}else{
			$('.home_ad_page').append('<a href="javascript:;" pi="'+pi+'"></a>');
		}
	}
	
	//显示默认标题
	//$('.ppt_page .title').html($('.ppt a').eq(0).attr('title'));
	
	//播放指定
	function ppt_play_to(index){
		var last_i = play_i;
		play_i = index;
		
		//alert('last:'+last_i+',play:'+play_i);
		
		$('.home_ad_page a.over').removeclass('over');
		$('.home_ad_page a').eq(play_i).addclass('over');
		
		$('.home_ad_banner a').eq(play_i).stop().css('left','100%').animate({'left':0},800,'easeinoutexpo');
		$('.home_ad_banner a').eq(last_i).stop().css('left','0').animate({'left':'-100%'},800,'easeinoutexpo',function(){
			$(this).css('left','100%');
		});
	}
	
	//自动播放
	function ppt_play_auto(){
		$('.home_ad_banner').stoptime().everytime('5s',function(){
			var ni = play_i+1;
			if(ni>=ppt_count){ni=0;}
			ppt_play_to(ni);
		});
	}
	
	//停止播放
	function ppt_stop(){
		$('.home_ad_banner').stoptime();
	}
	
	if(ppt_count>1){
		$('.home_ad_banner a').each(function(index, element) {
			if($(this).css('display')=='none'){
				$(this).css('left','100%').show();
			}
		});
		ppt_play_auto();
		
		$('.home_ad_page a').bind('click',function(){
			ppt_stop();
			var this_i = parseint($(this).attr('pi'),10);
			ppt_play_to(this_i);
			ppt_play_auto();
		});
		
		/*
		$('.ppt_prev').bind('click',function(){
			ppt_stop();
			play_i--;
			if(play_i<0){play_i=(ppt_count-1);}
			ppt_play_to(play_i);
			ppt_play_auto();
		});
		
		$('.ppt_next').bind('click',function(){
			ppt_stop();
			play_i++;
			if(play_i>=ppt_count){play_i=0;}
			ppt_play_to(play_i);
			ppt_play_auto();
		});
		//*/
	}
});