取得文件大小
<HTML><HEAD>
<SCRIPT>
function getImageDimension (imgURL, loadHandler) {
var img = new Image();
img.onload = loadHandler;
if (document.layers && location.protocol.toLowerCase() != 'file:' && navigator.javaEnabled())
netscape.security.PrivilegeManager.enablePrivilege( 'UniversalFileRead'
); img.src = imgURL;}
function getFileSize (fileName) {
if (document.layers) {
if (navigator.javaEnabled()) {
var file = new java.io.File(fileName);
if (location.protocol.toLowerCase() != 'file:')
netscape.security.PrivilegeManager.enablePrivilege(
'UniversalFileRead' );
return file.length(); }
else return -1; }
else if (document.all) {
window.oldonError = window.onerror;
window.onerror = function (err) {
if (err.indexOf('utomation') != -1) {
alert('file access not possible');
return true;
}
else
return false; };
var fso = new ActiveXObject('Scripting.FileSystemObject');
var file = fso.GetFile(fileName);
window.onerror = window.oldonError;
return file.Size; }}
function showImageDimensions () {
alert(this.width + 'x' + this.height);}
</SCRIPT>
<SCRIPT>
function checkImageDimensions (fileName) {
var imgURL = 'file:///' + fileName;
getImageDimension(imgURL, showImageDimensions);}
</SCRIPT>
</HEAD
><BODY>
<FORM NAME="formName"><INPUT TYPE="file" NAME="fileName"><BR>
<INPUT TYPE="button" value="check file size"
onCLICK="alert(getFileSize(this.form.fileName.value))"><BR>
<INPUT TYPE="button" value="check image dimensions"
onCLICK="checkImageDimensions(this.form.fileName.value)"></FORM></BODY>
</HTML>
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作者：Kiyo
链接：https://www.wkiyo.cn/html/2008-01/i57.html
来源：Kiyo's space
文章版权归作者所有，未经允许请勿转载。
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