图片加载过度

var src = iImg.attr("src1");
                var i = new Image();
                i.onload = function()
                {
                        iImg.attr("src",src);
                        iImg.removeAttr("src1");
                        iLoadingDirector.hide();        
                        clearTimeout(iTimerOut);
                        iNavAnimate(index);
                        iImgShow(index);
                        iAutoPLay(index);
                }
                i.src=src;