<script> //下面用于多图片上传预览功能 function setImagePreviews(avalue) { var docObj = document.getElementById("files"); var dd = document.getElementById("preview"); dd.innerHTML = ""; var fileList = docObj.files; for (var i = 0; i < fileList.length; i++) { dd.innerHTML += "<div > <img /> </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'; //控制缩略图大小 imgObjPreview.style.width = '70px'; imgObjPreview.style.height = '70px'; //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 = "70px"; localImagId.style.height = "70px"; //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>
HTML代码：
<form method="post" enctype="multipart/form-data"> <input type="file" accept="image/png,image/gif,image/jpg,image/jpeg" multiple onchange="javascript:setImagePreviews();" /> <input type="button" value="上传" /> <div> </div> </form>