jquery预加载图片的方法

function preloadImages(oImageList, callback) { if ( typeof (oImageList) == 'object' && typeof (callback) === "function") {  var iCallbackAfter = oImageList.length;  var iPreloadInterval = window.setInterval(function() {   if (iCallbackAfter === 0) {    window.clearInterval(iPreloadInterval);    callback();   }  }, 100);  $.each(oImageList, function(iIndex, sImage) {   oImageList[iIndex] = new Image();   oImageList[iIndex].onload = function(oResult) {    iCallbackAfter--;   };   oImageList[iIndex].onabort = function(oResult) {    console.log(oResult);   };   oImageList[iIndex].onerror = function(oResult) {    console.log(oResult);   };   if (!sImage.match('http://')) {    sImage = sImage;   }   oImageList[iIndex].src = sImage;  }); }}