復(fù)制代碼 代碼如下:
<!doctype html>
<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
<title>Image preview example</title>
<script type="text/javascript">
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 () {
alert(document.getElementById("imageInput").value);
document.getElementById("imagePreview").filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = document.getElementById("imageInput").value;
}
}
})();
</script>
<style type="text/css">
#imagePreview {
width: 160px;
height: 120px;
filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale);
}
</style>
</head>
<body>
<div>
</div>
<form>
<p>
<input type="file" onchange="loadImageFile();" /><br />
<input type="submit" value="Send" /></p>
</form>
</body>
</html>
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