多图片上传预览功能也是现在非常常用的
下面是html代码:
<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>测试页面</title><script type="text/javascript"> ???//下面用于多图片上传预览功能 ???function setImagePreviews(avalue) { ???????var docObj = document.getElementById("doc"); ???????var dd = document.getElementById("dd"); ???????dd.innerHTML = ""; ???????var fileList = docObj.files; ???????for (var i = 0; i < fileList.length; i++) { ???????????????????????dd.innerHTML += "<div style=‘float:left‘ > <img id=‘img" + i + "‘ ?/> </div>"; ???????????var imgObjPreview = document.getElementById("img"+i); ????????????if (docObj.files && docObj.files[i]) { ???????????????//火狐下，直接设img属性 ???????????????imgObjPreview.style.display = ‘block‘; ???????????????imgObjPreview.style.width = ‘150px‘; ???????????????imgObjPreview.style.height = ‘180px‘; ???????????????//imgObjPreview.src = docObj.files[0].getAsDataURL(); ???????????????//火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式 ???????????????imgObjPreview.src = window.URL.createObjectURL(docObj.files[i]); ???????????} ???????????else { ???????????????//IE下，使用滤镜 ???????????????docObj.select(); ???????????????var imgSrc = document.selection.createRange().text; ???????????????alert(imgSrc) ???????????????var localImagId = document.getElementById("img" + i); ???????????????//必须设置初始大小 ???????????????localImagId.style.width = "150px"; ???????????????localImagId.style.height = "180px"; ???????????????//图片异常的捕捉，防止用户修改后缀来伪造图片 ???????????????try { ???????????????????localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)"; ???????????????????localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc; ???????????????} ???????????????catch (e) { ???????????????????alert("您上传的图片格式不正确，请重新选择!"); ???????????????????return false; ???????????????} ???????????????imgObjPreview.style.display = ‘none‘; ???????????????document.selection.empty(); ???????????} ???????} ?????????return true; ???}</script></head><body><div style="margin :0px auto; width:990px;"><input type="file" ?name="file" id="doc" multiple="multiple" ?style="width:150px;" onchange="javascript:setImagePreviews();" accept="image/*" /><div id="dd" style=" width:990px;"></div></div></body></html>js之上传文件多图片预览
原文地址：https://www.cnblogs.com/youcong/p/9195404.html