javascript来判断客户端文件的大小<HTML><HEAD>
<SCRIPT>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