织梦dedecms5.6/5.7 新图集页面怎么增加图片下载功能

if(sina.isIE){
this.ImgObj1.src = ' /static/upload/image/20231003/2pwkfxspylq.gif';
this.ImgObj1.filters[0].Apply();
this.ImgObj1.src = this.filmstrips[num].src;
this.ImgObj1.filters[0].Play();
}else{
this.ImgObj1.src = this.filmstrips[num].src;
for(i = 0;i <= 3;i ++){
this._timeOut[i] = setTimeout("epidiascope.ImgObj1.style.opacity = " + i * 0.3,i * 100);
};
this._timeOut[i] = setTimeout("epidiascope.ImgObj1.style.opacity = 1;",4 * 100);
};

document.all.imgsrcs.href=(this.ImgObj1.src);

<a href="#" title="" target="_blank" class="greencu" id="imgsrcs">[右键另存为下载]</a>