function findImg() { var charImg = document.all("chartImg").getElementsByTagName("img"); var imgURLs = ""; for (var i = 0; i < charImg.length; i++) { var imgPath = getImgPath(charImg[i].src); var imgNames=getImgNames(imgPath); if (imgNames!= "vt2.png") { imgURLs += imgNames; //如果用document.getElementsByTagName("img")[i].src;每取一个图片地址就会对全部图片查找一次,这样效率比较低,还是储存在imgs中比较好! } } alert( imgURLs);