js代码:<script>//下面用于多图片上传预览功能functionsetImagePreviews(avalue){vardocObj=document.ge
js 代码:
<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 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';
//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" id="files" name="files" multiple onchange="javascript:setImagePreviews();" />
<input type="button" id="upload" value="上传" />
<div id="preview">
</div>
</form>
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多图上传预览