JavaScript实现相册弹窗功能（zepto.js)

先看看弹窗效果，如下： 

//放大图片
 $(page).on('click','.popupImage img',function () {
  var that = $(this);
  that.popupImage({
   this:that,
   width:"200px"
  })
 });

//相册弹窗
$.fn.popupImage = function (obj) {
 var $this = obj.this;
 var sj_w = $this[0].naturalHeight;
 var src = $this.attr('src');
 var h = $('body').height();
 var w = $('body').width();
 var padding = 10;
 var shadeW = w - padding*2;
 var img = '',shade = '';

img = '<div class="popup-image" style="position:absolute; top:0; left:0; z-index: 999999; padding:10px '+padding+'px; width: '+w+'px; height:'+h+'px; line-height: '+h+'px; text-align: center;" >' +
  '<img src="'+src+'" style="max-width: '+shadeW+'px"/></div>';
 shade = '<div class="shade" style="position:absolute; top:0; left:0; width: '+w+'px; height:'+h+'px;background: #000; z-index: 999990; opacity: .8;"></div>';

$('body').append(shade);
 $('body').append(img);  

$('.popup-image').on('click',function () {
  $('.popup-image').remove();
  $('.shade').remove();
 })

};