我网站上传图片部分的图片预览在 IE8+ 浏览器中不起作用。但在 IE7 和 IE6 中工作正常。我正在使用下面的代码来实现图像预览功能。 JS:
var loadImageFile = (function () {
if (window.FileReader) {
var oPreviewImg = null, oFReader = new window.FileReader(),
rFilter = /^(?:image\/bmp|image\/cis\-cod|image\/gif|image\/ief|image\/jpeg|image\/jpeg|image\/jpeg|image\/pipeg|image\/png|image\/svg\+xml|image\/tiff|image\/x\-cmu\-raster|image\/x\-cmx|image\/x\-icon|image\/x\-portable\-anymap|image\/x\-portable\-bitmap|image\/x\-portable\-graymap|image\/x\-portable\-pixmap|image\/x\-rgb|image\/x\-xbitmap|image\/x\-xpixmap|image\/x\-xwindowdump)$/i;
oFReader.onload = function (oFREvent) {
if (!oPreviewImg) {
var newPreview = document.getElementById("imagePreview");
oPreviewImg = new Image();
oPreviewImg.style.width = (newPreview.offsetWidth).toString() + "px";
oPreviewImg.style.height = (newPreview.offsetHeight).toString() + "px";
newPreview.appendChild(oPreviewImg);
}
oPreviewImg.src = oFREvent.target.result;
};
return function () {
var aFiles = document.getElementById("imageInput").files;
if (aFiles.length === 0) { return; }
if (!rFilter.test(aFiles[0].type)) { alert("You must select a valid image file!"); return; }
oFReader.readAsDataURL(aFiles[0]);
}
}
if (navigator.appName === "Microsoft Internet Explorer") {
return function () {
document.getElementById("imagePreview").filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = document.getElementById("imageInput").value;
}
}
})();
CSS 样式:
#imagePreview {
width: 160px;
height: 120px;
float: right;
filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale);
}
</style>
HTML:
<html>
<body>
<div id="imagePreview"></div>
<form name="uploadForm">
<p><input id="imageInput" type="file" name="myPhoto" onchange="loadImageFile();"><br>
<input type="submit" value="Send"></p>
</form>
</body>
</html>
此代码在 IE 6 和 IE7 中运行,但不在 IE8+ 中运行。任何人都知道上面代码中的问题是什么。运行示例链接: https ://developer.mozilla.org/files/3699/crossbrowser_image_preview.html