標籤：style c class blog code java
由於項目需要，在網上找了一個JS判斷上傳檔案大小的程式，經測試相容IE6-9，Firefox10,Opera11.6,safari5.1,chrome17<!DOCTYPE html><html><head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>js判斷上傳檔案的大小</title> <script type="text/javascript"> var isIE = /msie/i.test(navigator.userAgent) && !window.opera; var sizeLabel = ["B", "KB", "MB", "GB"]; function fileChange(target) { var fileSize = 0; if (isIE && !target.files) { var filePath = target.value; var fileSystem = new ActiveXObject("Scripting.FileSystemObject"); var file = fileSystem.GetFile (filePath); fileSize = file.Size; } else { fileSize = target.files[0].size; } displayFileSize(fileSize); } function displayFileSize(size) { var fileSize = document.getElementById("fileSize"); fileSize.innerHTML = calFileSize(size); } function calFileSize(size) { for (var index = 0; index < sizeLabel.length; index++) { if (size < 1024) { return round(size, 2) + sizeLabel[index]; } size = size / 1024; } return round(size, 2) + sizeLabel[index]; } function round(number, count) { return Math.round(number * Math.pow(10, count)) / Math.pow(10, count); } </script></head><body> <div> <input type="file" onchange="fileChange(this);"> </div> <div id="fileSize"> </div></body></html>
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
