// JavaScript Document

if ( typeof Object.create !== "function" ) {//如果Object.create不是函数方法 给Object.create创建函数方法 针对IE8及以下
	Object.create = function( obj ) {
		function F() {};
		F.prototype = obj;
		return new F();
	};
};
(function( $, window, document, undefined ) {
	var iterations = 0;
	var imgIds = 0;
	var loadImg = {
		
		init:function(options,img,imgNum){
			var imgObj = this;
			imgObj.options = $.extend({}, $.fn.imageLoadimg.options, options);
			imgObj.img = $(img);
			imgObj.imgNum = imgNum;
			iterations = 0;
			imgObj.loadImg_fun();
		},
		
		loadImg_fun:function(){
			var base = this;
			var imgObj = this.img.get(0);
			
			function completeImg(img) {
				if (!img.complete) {
					return false;
				}
				if (typeof img.width !== "undefined" && img.width == 0) {
					return false;
				}
				return true;
			}
			function checkImage(){
				iterations++;
				if (completeImg(imgObj)) {
					if(typeof base.options.afterLoad === "function") {
						base.options.afterLoad.apply(imgObj);
					};
					
					if(base.options.isMiddle!=false){
						var imgWnum = imgObj.width;
						var imgHnum = imgObj.height;
						var imgMar_left = 0;
						var imgMar_top = 0;
						
						if(base.options.isMiddle=='center-no'){
							imgMar_left = (base.img.parent().width()-imgObj.width)/2;
							base.img.css({'margin-left':imgMar_left});
							return;
						}
						if(base.options.isMiddle=='fullAll'){
							imgWnum = base.img.parent().width();
							imgHnum = imgWnum/imgObj.width*imgObj.height;
							if(imgHnum<base.img.parent().height()){ base.img.css({'width':imgwnum,'height':imghnum,'margin-left':imgmar_left,'margin-top':imgmar_top});="" if(imgwnum="" imghnum="base.img.parent().height();" imgmar_left="(base.img.parent().width()-imgWnum)/2;" imgmar_top="(base.img.parent().height()-imgHnum)/2;" imgwnum="imgHnum/imgObj.height*imgObj.width;" return;="" };="">base.img.parent().width()){
							imgWnum = base.img.parent().width();
							imgHnum = imgWnum/imgObj.width*imgHnum;
						}else{
							imgWnum = imgObj.width;
							imgHnum = imgObj.height;
						};
						if(imgWnum/imgObj.width*imgHnum&gt;base.img.parent().height()){
							imgHnum = base.img.parent().height();
							imgWnum = imgHnum/imgObj.height*imgObj.width;
						};
						
						imgMar_left = (base.img.parent().width()-imgWnum)/2;
						imgMar_top = (base.img.parent().height()-imgHnum)/2;
						base.img.css({'width':imgWnum,'height':imgHnum});						
						switch (base.options.isMiddle){
							case 'justify':
							base.img.css({'margin-top':imgMar_top});
							break;
							case 'center':
							base.img.css({'margin-left':imgMar_left});
							break;
							case 'center-no':
							break;
							default:
							base.img.css({'margin-left':imgMar_left,'margin-top':imgMar_top});
							break;
							//base.img.css({''})
						}
					};
					if(imgIds===base.imgNum-1){
						if(typeof base.options.initLoad === "function") {
							base.options.initLoad.apply(base);
						};
					};
					
					if(imgIds&lt;base.imgNum-1){
						imgIds ++ ;
					}else{
						imgIds = 0;
					};
					
				 } else if(iterations &lt;= 400){ 
					setTimeout(function(){checkImage()},100);
				 } else {
					//loaderro();
					//alert('图片不存在：'+imgObj.src);
				 }
			};
			if(imgObj!== 'undefined'){
				checkImage();
			};
			
		}
	};
	$.fn.imageLoadimg = function(options){
		var imgNum = this.length;
		this.each(function(){
		
			var imgFun = Object.create( loadImg );//Object.create IE8及以下没有该方法 需自定义创建
			
			imgFun.init( options, this,imgNum);
		});
	};
	$.fn.imageLoadimg.options ={
		afterLoad:false,
		initLoad:false,
		isMiddle:false
	};
})( jQuery, window, document ); 

/*  
	isMiddle：是否对图片做对齐操作	  默认：false 
	可选项：
	'center':   左右居中            自适应 
	'justify':  垂直居中            自适应
	 true：     左右垂直居中         自适应
	 false:     不对图片进行任何操作
	'no-center':图片居中            不执行自适应
	'fullAll':  图片撑满            自适应 注：图片比容器小时会进行拉伸
 */
</base.img.parent().height()){>