<input id="sfz_shouchi" name="sfz_shouchi" type="file" onchange="preImg(this.id,‘sfz_shouchi_img‘);" accept="image/*" required="">
<script language="javascript"> ???function getFileUrl(sourceId) { ???????var url; ???????if (navigator.userAgent.indexOf("MSIE") >= 1) { // IE ???????????url = document.getElementById(sourceId).value; ???????} else if (navigator.userAgent.indexOf("Firefox") > 0) { // Firefox ???????????url = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0)); ???????} else if (navigator.userAgent.indexOf("Chrome") > 0) { // Chrome ???????????url = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0)); ???????} ???????return url; ???} ???function preImg(sourceId, targetId) { ???????var url = getFileUrl(sourceId); ???????var imgPre = document.getElementById(targetId); ???????imgPre.src = url; ???}</script>上传图片 js 不确定不多图片
原文地址：https://www.cnblogs.com/JANCHAN/p/9117706.html