/* imgWidth：图片长，默认275px
imgHeight：图片宽，默认215px
numAlpha：数字导航透明度，0-1之间，默认为1，不透明
numColor：数字导航颜色，默认为白色#fff
numBGColor：数字导航背景颜色，默认为黑色#000
numFocusColor：获取焦点数字导航颜色，默认为白色#fff
numFocusBGColor：获取焦点数字导航背景颜色，默认为红色#f00
numPosition：导航居左还是右，默认居右
imgFilterIndex：仅IE5..5浏览器有用，指定要使用的滤镜，提供11种滤镜，值为0~10的数字，未指定则随机一个滤镜
delay：自动播放间隔，单位ms，默认8000ms
tlLineHeight：标题行高，默认25px
tlFontSize：标题字体大小，默认13px
tlColor：标题颜色，默认黑色#000
tlFontWeight：标题样式，默认normal
*/
var libImages = function (cfg) {
this.initProperty = function (cfg) {
var attrs = 'imgWidth,imgHeight,numAlpha,numColor,numBGColor,numFocusColor,numFocusBGColor,imgFilterIndex,delay,tlFontSize,tlColor,tlLineHeight,tlFontWeight,numPosition'.split(',')
, values = '275,215,1,#fff,transparent,#fff,transparent,rnd,8000,13,#fff,25,normal,right'.split(','), rxInt = /^\d+$/;
for (var i = 0; i < attrs.length; i++) this[attrs[i]] = typeof (cfg[attrs[i]]) != 'undefined' ? cfg[attrs[i]] : (rxInt.test(values[i]) ? parseFloat(values[i]) : values[i]);
}
this.rnd = function () { return Math.floor(Math.random() * this.filters.length); }
this.$ = function (Id) { return document.getElementById(Id); }
this.initProperty(cfg ? cfg : {});
if (cfg.numPosition != 'left' && cfg.numPosition != 'right') cfg.numPosition = 'right';
this.instanceIndex = libImages.instance++
this.isIE = !!document.all;
this.IEVertion = -1;
if (this.isIE) this.IEVersion = parseFloat(/msie ([\d\.]+)/i.exec(navigator.userAgent)[1]);
this.filters = this.isIE && this.IEVersion > 5.4 ? ("progid:DXImageTransform.Microsoft.Pixelate(,enabled=false,duration=1,maxSquare=25);"
+ "progid:DXImageTransform.Microsoft.Fade(duration=1,overlap=0);"
+ "progid:DXImageTransform.Microsoft.GradientWipe(duration=1,gradientSize=0.25,motion=forward );"
+ "progid:DXImageTransform.Microsoft.Stretch(duration=1,stretchStyle=PUSH);"
+ "progid:DXImageTransform.Microsoft.Wheel(duration=1,spokes=16);"
+ "progid:DXImageTransform.Microsoft.RandomDissolve(duration=1);"
+ "progid:DXImageTransform.Microsoft.Spiral(duration=1,gridSizeX=50,gridSizeY=50);"
+ "progid:DXImageTransform.Microsoft.Slide(duration=1,bands=1,slideStyle=SWAP);"
+ "progid:DXImageTransform.Microsoft.RadialWipe(duration=1,wipeStyle=CLOCK);"
+ "progid:DXImageTransform.Microsoft.Blinds(Bands=10,direction=up);"
+ "progid:DXImageTransform.Microsoft.Checkerboard(Direction=right,SquaresX=2,SquaresY=2)").split(';') : false;
if (this.filters && this.imgFilterIndex != 'rnd' && this.imgFilterIndex >= this.filters.length) this.imgFilterIndex = 'rnd';
/*
arr为json数组对象，如[{u:'链接',tl:'标题',img:'图片路径'},{u:'链接',tl:'标题',img:'图片路径'}.....]
*/
this.chrImage = function (a, arrIndex) {
var as = this.$('dvNum' + this.instanceIndex).getElementsByTagName('a'), me = this;
for (var i = 0; i < as.length; i++) as[i].className = '';
if (a) {this.nowIndex=arrIndex; clearInterval(this.timer); a.className = 'numfocus'; this.timer = setInterval(function () { me.chrImage(); }, this.delay); }
else as[this.nowIndex].className = 'numfocus';
if (this.filters) { this.$('imgObj' + this.instanceIndex).style.filter = this.filters[this.imgFilterIndex == 'rnd' ? this.rnd() : this.imgFilterIndex]; this.$('imgObj' + this.instanceIndex).filters[0].apply() }
if (this.arr[this.nowIndex].u) this.$('imgHref' + this.instanceIndex).href = this.$('wordHref' + this.instanceIndex).href = this.arr[this.nowIndex].u;
if (this.arr[this.nowIndex].tl || this.arr[this.nowIndex].entl) this.$('wordHref' + this.instanceIndex).innerHTML = this.arr[this.nowIndex].tl + (this.arr[this.nowIndex].entl ? '' + this.arr[this.nowIndex].entl + '' : '');
this.$('imgObj' + this.instanceIndex).src = this.arr[this.nowIndex].img;
this.$('imgObj' + this.instanceIndex).alt = this.arr[this.nowIndex].tl ? this.arr[this.nowIndex].tl : this.arr[this.nowIndex].entl ? this.arr[this.nowIndex].entl : '';
if (this.dtID && this.arr[this.nowIndex].dt) this.$(this.dtID).innerHTML = (this.arr[this.nowIndex].tl?' ':'') + '' + this.arr[this.nowIndex].dt + '';
if (this.filters) this.$('imgObj' + this.instanceIndex).filters[0].play();
this.nowIndex++;
if (this.nowIndex >= this.arr.length) this.nowIndex = 0;
return false;
}
this.init = function (arr, dtID) {
if (typeof (arr) == 'undefined' || arr.length == 0) { alert('未指定数据源或者数据源为空！'); return false; }
this.arr = arr;
this.nowIndex = 1;
this.dtID = dtID;
document.write('');
document.write('\
![' + (arr[0].tl ? arr[0].tl : arr[0].entl ? arr[0].entl : '') + '](' + arr[0].img + ')
\
\
\
\
', pNode = this.$('dvNum' + this.instanceIndex), a, me = this;
for (var i = 0; i < arr.length; i++) {
a = document.createElement('a');
if (i == 0) a.className = 'numfocus';
a.innerHTML = i + 1; a.href = 'javascript:void(0)'; a.setAttribute('idx', i);
if (arr.length > 1) a.onclick = function () { me.chrImage(this, parseInt(this.getAttribute('idx', 10))); }
pNode.appendChild(a);
}
if (arr.length > 1) this.timer = setInterval(function () { me.chrImage(); }, this.delay);
}
}
libImages.instance = 0;