用jquery来获取上传文件的大小

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<html xmlns="http://www.w3.org/1999/xhtml"><head> <title>Get File Size</title>  <script src="http://code.jquery.com/jquery-1.11.0.min.js" type="text/javascript" > </script> <script type="text/javascript"> function GetFileSize(fileid) { try { var fileSize = 0; //for IE if ($.support.msie) { //before making an object of ActiveXObject,  //please make sure ActiveX is enabled in your IE browser var objFSO = new ActiveXObject("Scripting.FileSystemObject"); var filePath = $("#" + fileid)[0].value; var objFile = objFSO.getFile(filePath); var fileSize = objFile.size; //size in kb fileSize = fileSize / 1048576; //size in mb  } //for FF, Safari, Opeara and Others else { fileSize = $("#" + fileid)[0].files[0].size //size in kb fileSize = fileSize / 1048576; //size in mb  } alert("Uploaded File Size is" + fileSize + "MB"); } catch (e) { alert("Error is :" + e); }} </script></head><body><form name="upload" action=""><input type="file" name="fUpload" id="fUpload" /><input type="button" value="Get File Size" onclick="GetFileSize('fUpload');" /></form></body></html>

转载自：http://bbs.csdn.net/topics/390722613

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