var timer = null;
var offset = 5000;
var index = 0;

//��ͼ�����ֻ�
function slideImage(i){
    var id = 'image_'+ target[i];
    var imgsrc=$j('#'+ id).children("a").attr("img_src");
    var idImg=$j('#'+ id).children("a").children("img").attr("id");
    if(document.getElementById(idImg)){
	    document.getElementById(idImg).src=imgsrc;
	}
    $j('#'+ id)
        .animate({opacity: 1}, 800, function(){
            $j(this).find('.word').animate({height: 'show'}, 'slow');
        }).show()
        .siblings(':visible')
        .find('.word').animate({height: 'hide'},'fast',function(){
            $j(this).parent().animate({opacity: 0}, 800).hide();
        });
}
//bind thumb a
function hookThumb(){    
    $j('#thumbs li a')
        .bind('click', function(){
            if (timer) {
                clearTimeout(timer);
            }                
            var id = this.id;            
            index = getIndex(id.substr(6));
            rechange(index);
            slideImage(index); 
            timer = window.setTimeout(auto, offset);  
            this.blur();            
            return false;
        });
}

//get index
function getIndex(v){
    for(var i=0; i < target.length; i++){
        if (target[i] == v) return i;
    }
}
function rechange(loop){
    var id = 'thumb_'+ target[loop];
    $j('#thumbs li a.current').removeClass('current');
    $j('#'+ id).addClass('current');
}
function auto(){
    index++;
    if (index > ($j('#featured img').size()-1)){
        index = 0;
    }
    rechange(index);
    slideImage(index);
    timer = window.setTimeout(auto, offset);
}
$j(function(){    
    //change opacity
   // $j('div.word').css({opacity: 0.85});
    index = $j('#featured img').size();
    auto();  
    hookThumb(); 
   // hookBtn();
    
});