1 /* 2     重新按比例设置 页面上对应图片的长和高， 3  */ 4 function resetImgSize(id,imgWidth,imgHeight,posWidth,posHeight) { 5     var width = 0; 6     var height = 0; 7     // 按比例缩小图片的算法 8     if(imgWidth > imgHeight) { 9         if(imgWidth > posWidth) {10             width = posWidth;11             height = imgHeight/imgWidth * width;12             13         }else {14             width = imgWidth;15             height = imgHeight;16         }17     }else {18         if(imgHeight > posHeight) {19             height = posHeight;20             width = (imgWidth/imgHeight) * height;21         }else {22             width = imgWidth;23             height = imgHeight;24         }25     }26     width = Math.floor(width);27     height = Math.floor(height);28     $(‘#‘+id).attr(‘width‘,width);29     $(‘#‘+id).attr(‘height‘,height);30     $(‘#‘+id).css(‘padding-left‘,(posWidth-width)/2);31     $(‘#‘+id).css(‘padding-top‘,(posHeight-height)/2);32 33 }34 35 /*36     获取图片尺寸37     imgURL  图片加载地址38     posId   图片位置id39     posWidth 放在图片位置的width40     posHeight 放在图片位置的height41  */42 43 function getImgSize(imgURL,posId,posWidth,posHeight) {44 45     var img = new Image();46      47 48     img.src = http://www.mamicode.com/imgURL+‘?‘+Math.random();49     var width = 0;50     var height = 0;51     52 53     var check = function(){54 55         if(img.width > 0) {56 57         clearInterval(set);58         59         resetImgSize(posId,img.width,img.height,posWidth,posHeight);60         }61     };62      63     var set = setInterval(check,40);64 65     img.onload = function(){66         67         clearInterval(set);68     };69 70     71 }72 73 $(function(){74     $(‘.resetsize‘).each(function(){75         getImgSize(this.src,this.id,168,168);76     });77 });