// JavaScript Document
/**
 *glide.layerGlide((oEventCont,oSlider,sSingleSize,sec,fSpeed,point);
 *@param auto type:bolean 是否自动滑动 当值是true的时候 为自动滑动
 *@param oEventCont type:object 包含事件点击对象的容器
 *@param oSlider type:object 滑动对象
 *@param sSingleSize type:number 滑动对象里单个元素的尺寸（width或者height）  尺寸是有point 决定
 *@param second type:number 自动滑动的延迟时间  单位/秒
 *@param fSpeed type:float   速率 取值在0.05--1之间 当取值是1时  没有滑动效果
 *@param point type:string   left or top
 */
var glide =new function(){
	function $id(id){return document.getElementById(id);};
	this.layerGlide=function(auto,oEventCont,oSlider,sSingleSize,second,fSpeed,point){
		var oSubLi = $id(oEventCont).getElementsByTagName('li');
		var interval,timeout,oslideRange;
		var time=1; 
		var speed = fSpeed 
		var sum = oSubLi.length;
		var a=0;
		var delay=second * 1000; 
		var setValLeft=function(s){
			return function(){
				oslideRange = Math.abs(parseInt($id(oSlider).style[point]));	
				$id(oSlider).style[point] =-Math.floor(oslideRange+(parseInt(s*sSingleSize) - oslideRange)*speed) +'px';		
				if(oslideRange==[(sSingleSize * s)]){
					clearInterval(interval);
					a=s;
				}
			}
		};
		var setValRight=function(s){
			return function(){	 	
				oslideRange = Math.abs(parseInt($id(oSlider).style[point]));							
				$id(oSlider).style[point] =-Math.ceil(oslideRange+(parseInt(s*sSingleSize) - oslideRange)*speed) +'px';
				if(oslideRange==[(sSingleSize * s)]){
					clearInterval(interval);
					a=s;
				}
			}
		}
		
		function autoGlide(){
			for(var c=0;c<sum;c++){oSubLi[c].className='';};
			clearTimeout(interval);
			if(a==(parseInt(sum)-1)){
				for(var c=0;c<sum;c++){oSubLi[c].className='';};
				a=0;
				oSubLi[a].className="active";
				interval = setInterval(setValLeft(a),time);
				timeout = setTimeout(autoGlide,delay);
			}else{
				a++;
				oSubLi[a].className="active";
				interval = setInterval(setValRight(a),time);	
				timeout = setTimeout(autoGlide,delay);
			}
		}
	
		if(auto){timeout = setTimeout(autoGlide,delay);};
		for(var i=0;i<sum;i++){	
			oSubLi[i].onmouseover = (function(i){
				return function(){
					for(var c=0;c<sum;c++){oSubLi[c].className='';};
					clearTimeout(timeout);
					clearInterval(interval);
					oSubLi[i].className="active";
					if(Math.abs(parseInt($id(oSlider).style[point]))>[(sSingleSize * i)]){
						interval = setInterval(setValLeft(i),time);
						this.onmouseout=function(){if(auto){timeout = setTimeout(autoGlide,delay);};};
					}else if(Math.abs(parseInt($id(oSlider).style[point]))<[(sSingleSize * i)]){
							interval = setInterval(setValRight(i),time);
						this.onmouseout=function(){if(auto){timeout = setTimeout(autoGlide,delay);};};
					}
				}
			})(i)			
		}
	}
}


//图片展示
function initCarousel_html_carousel() {carousel = new Carousel('html-carousel', {animHandler:animHandler, animParameters:{duration:0.5}, buttonStateHandler:buttonStateHandler, nextElementID:'next-arrow', prevElementID:'prev-arrow', size:31})};Event.observe(window, 'load', initCarousel_html_carousel);
function buttonStateHandler(button, enabled) {
 if (button == "prev-arrow") 
   $('prev-arrow').src = enabled ? "/data/skins/chinese/image/left_enable.gif" : "/data/skins/chinese/image/left.gif"
 else 
   $('next-arrow').src = enabled ? "/data/skins/chinese/image/right_enable.gif" : "/data/skins/chinese/image/right.gif"
}

function animHandler(carouselID, status, direction) {
  var region = $(carouselID).down(".carousel-clip-region")
  if (status == "before") {
    Effect.Fade(region, {to: 0.3, queue: { position:'end', scope: "carousel" }, duration: 0.2})
  }
  if (status == "after") {
    Effect.Fade(region, {to: 1, queue: { position:'end', scope: "carousel" }, duration: 0.2})
  }
}