/**************************************************
名称: 图片轮播类
创建时间: 2007-11-12
示例:
页面中已经存在名为imgPlayer(或者别的ID也行)的节点.
PImgPlayer.addItem( "test", "http://www.wmis.com.cn", "images/p_1.jpg");
PImgPlayer.addItem( "test2", "http://www.wmis.com.cn", "images/p_2.jpg");
PImgPlayer.addItem( "test3", "http://www.wmis.com.cn", "images/p_3.jpg");
PImgPlayer.addItem( "test4", "http://www.wmis.com.cn", "images/p_4.jpg");
PImgPlayer.init( "imgPlayer", 770, 180 );
备注:
适用于一个页面只有一个图片轮播的地方.
***************************************************/
var PImgPlayer = {
	_timer: null,
	_items: [],
	_container: null,
	_index: 0,
	_imgs: [],
	intervalTime: 5000, //轮播间隔时间
	init: function(objID, w, h, time) {
		this.intervalTime = time || this.intervalTime;
		this._container = document.getElementById(objID);
		this._container.style.display = "block";
		this._container.style.width = w + "px";
		this._container.style.height = h + "px";
		this._container.style.position = "relative";
		this._container.style.overflow = "hidden";
		//this._container.style.border = "1px solid #fff";
		var linkStyle = "display: block; TEXT-DECORATION: none;";
		if (document.all) {
			linkStyle += "FILTER:";
			linkStyle += "progid:DXImageTransform.Microsoft.Barn(duration=0.5, motion='out', orientation='vertical') ";
			linkStyle += "progid:DXImageTransform.Microsoft.Barn ( duration=0.5,motion='out',orientation='horizontal') ";
			linkStyle += "progid:DXImageTransform.Microsoft.Blinds ( duration=0.5,bands=10,Direction='down' )";
			linkStyle += "progid:DXImageTransform.Microsoft.CheckerBoard()";
			linkStyle += "progid:DXImageTransform.Microsoft.Fade(duration=0.5,overlap=0)";
			linkStyle += "progid:DXImageTransform.Microsoft.GradientWipe ( duration=1,gradientSize=1.0,motion='reverse' )";
			linkStyle += "progid:DXImageTransform.Microsoft.Inset ()";
			linkStyle += "progid:DXImageTransform.Microsoft.Iris ( duration=1,irisStyle=PLUS,motion=out )";
			linkStyle += "progid:DXImageTransform.Microsoft.Iris ( duration=1,irisStyle=PLUS,motion=in )";
			linkStyle += "progid:DXImageTransform.Microsoft.Iris ( duration=1,irisStyle=DIAMOND,motion=in )";
			linkStyle += "progid:DXImageTransform.Microsoft.Iris ( duration=1,irisStyle=SQUARE,motion=in )";
			linkStyle += "progid:DXImageTransform.Microsoft.Iris ( duration=0.5,irisStyle=STAR,motion=in )";
			linkStyle += "progid:DXImageTransform.Microsoft.RadialWipe ( duration=0.5,wipeStyle=CLOCK )";
			linkStyle += "progid:DXImageTransform.Microsoft.RadialWipe ( duration=0.5,wipeStyle=WEDGE )";
			linkStyle += "progid:DXImageTransform.Microsoft.RandomBars ( duration=0.5,orientation=horizontal )";
			linkStyle += "progid:DXImageTransform.Microsoft.RandomBars ( duration=0.5,orientation=vertical )";
			linkStyle += "progid:DXImageTransform.Microsoft.RandomDissolve ()";
			linkStyle += "progid:DXImageTransform.Microsoft.Spiral ( duration=0.5,gridSizeX=16,gridSizeY=16 )";
			linkStyle += "progid:DXImageTransform.Microsoft.Stretch ( duration=0.5,stretchStyle=PUSH )";
			linkStyle += "progid:DXImageTransform.Microsoft.Strips ( duration=0.5,motion=rightdown )";
			linkStyle += "progid:DXImageTransform.Microsoft.Wheel ( duration=0.5,spokes=8 )";
			linkStyle += "progid:DXImageTransform.Microsoft.Zigzag ( duration=0.5,gridSizeX=4,gridSizeY=40 ); width: 100%; height: "+h-22+"px;";
		}
		//
		var ulStyle = "margin:0;width:" + w + "px;position:absolute;z-index:999;right:0px;FILTER:Alpha(Opacity=30,FinishOpacity=90, Style=1);overflow: hidden;bottom:21px;height:17px; border-right:1px solid #fff;";
		//
		var liStyle = "margin:0;list-style-type: none; margin:0;padding:0; float:right;";
		//
		var baseSpacStyle = "clear:both; display:block; width:23px;line-height:18px; font-size:12px; FONT-FAMILY:'宋体';opacity: 0.6;";
		baseSpacStyle += "border:1px solid #fff;border-right:0;border-bottom:0;";
		baseSpacStyle += "color:#fff;text-align:center; cursor:pointer; ";
		//
		var TitStyle = "margin:0;width:100%;position:absolute;z-index:999;left:0px;overflow: hidden;FILTER:Alpha(Opacity=30,FinishOpacity=90, Style=1);overflow;bottom:-1px;height:22px; border:1px solid #fff;border-bottom:0;font-size:12px;color:#fff;opacity: 0.6;line-height:22px;text-align:center;background-color:#000";
		
		//
		var ulHTML = "";
		for (var i = this._items.length - 1; i >= 0; i--) {
			var spanStyle = "";
			if (i == this._index) {
				spanStyle = baseSpacStyle + "background:#ff0000;";
			} else {
				spanStyle = baseSpacStyle + "background:#000;";
			}
			ulHTML += "<li style=\"" + liStyle + "\">";
			ulHTML += "<span onmouseover=\"PImgPlayer.mouseOver(this);\" onmouseout=\"PImgPlayer.mouseOut(this);\" style=\"" + spanStyle + "\" onclick=\"PImgPlayer.play(" + i + ");return false;\" herf=\"javascript:;\" title=\"" + this._items[i].title + "\">" + (i + 1) + "</span>";
			ulHTML += "</li>";
		}
		var TitHTML = "<div style=\"" + TitStyle + "\">" + this._items[this._index].title.substring(0,24) + "</div>";

		var html = "";
		if (this._items[this._index].link == "") {
			html = "<a href=\"#\" title=\"" + this._items[this._index].title + "\" style=\"" + linkStyle + "\"></a><ul style=\"" + ulStyle + "\">" + ulHTML + "</ul>" + TitHTML;
		}
		else {
			html = "<a href=\"" + this._items[this._index].link + "\" title=\"" + this._items[this._index].title + "\" target=\"_blank\" style=\"" + linkStyle + "\"></a><ul style=\"" + ulStyle + "\">" + ulHTML + "</ul>" + TitHTML;
		}

		this._container.innerHTML = html;
		
		
		var link = this._container.getElementsByTagName("A")[0];
		link.style.width = w + "px";
		link.style.height = h-22 + "px";
		link.style.background = 'url(' + this._items[0].img + ') no-repeat center center';
		//
		this._timer = setInterval("PImgPlayer.play()", this.intervalTime);
	},
	addItem: function(_title, _link, _imgURL) {
		this._items.push({ title: _title, link: _link, img: _imgURL });
		var img = new Image();
		img.src = _imgURL;
		this._imgs.push(img);
	},
	play: function(index) {
		if (index != null) {
			this._index = index;
			clearInterval(this._timer);
			this._timer = setInterval("PImgPlayer.play()", this.intervalTime);
		} else {
			this._index = this._index < this._items.length - 1 ? this._index + 1 : 0;
		}
		var link = this._container.getElementsByTagName("A")[0];
		if (link.filters) {
			var ren = Math.floor(Math.random() * (link.filters.length));
			link.filters[ren].Apply();
			link.filters[ren].play();
		}
		link.href = this._items[this._index].link;
		link.title = this._items[this._index].title;
		if (this._items[this._index].link != "") {
			link.target = "_blank";
		}

		link.style.background = 'url(' + this._items[this._index].img + ') no-repeat center center';
		//
		var tit = this._container.getElementsByTagName("DIV")[0];
		tit.innerHTML = this._items[this._index].title.substring(0,24);
		//
		var liStyle = "margin:0;list-style-type: none; margin:0;padding:0; float:right;";
		var baseSpacStyle = "clear:both; display:block; width:23px;line-height:18px; font-size:12px; FONT-FAMILY:'宋体'; opacity: 0.6;";
		baseSpacStyle += "border:1px solid #fff;border-right:0;border-bottom:0;";
		baseSpacStyle += "color:#fff;text-align:center; cursor:pointer; ";
		var ulHTML = "";
		for (var i = this._items.length - 1; i >= 0; i--) {
			var spanStyle = "";
			if (i == this._index) {
				spanStyle = baseSpacStyle + "background:#ff0000;";
			} else {
				spanStyle = baseSpacStyle + "background:#000;";
			}
			ulHTML += "<li style=\"" + liStyle + "\">";
			ulHTML += "<span onmouseover=\"PImgPlayer.mouseOver(this);\" onmouseout=\"PImgPlayer.mouseOut(this);\" style=\"" + spanStyle + "\" onclick=\"PImgPlayer.play(" + i + ");return false;\" herf=\"javascript:;\" title=\"" + this._items[i].title + "\">" + (i + 1) + "</span>";
			ulHTML += "</li>";
		}
		
		this._container.getElementsByTagName("UL")[0].innerHTML = ulHTML;
	},
	mouseOver: function(obj) {
		var i = parseInt(obj.innerHTML);
		if (this._index != i - 1) {
			obj.style.color = "#ff0000";
		}
	},
	mouseOut: function(obj) {
		obj.style.color = "#fff";
	}
}