JQuery 獲取驗證上傳檔案大小程式碼
阿新 • • 發佈：2018-12-19
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <meta name="DEscription" contect="my code demo" />
- <meta name="Author" contect="[email protected]" />
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- </head>
- <body>
- <img id="tempimg" dynsrc="" src="" style="display:none" />
- <input type="file" name="file" id="fileuploade" size="40" />
- <input type="button" name ="check" value="checkfilesize" onclick="checkfile()"/>
- </body>
- <script type="text/javascript">
- var maxsize = 2*1024*1024;//2M
- var errMsg = "上傳的附件檔案不能超過2M！！！";
- var tipMsg = "您的瀏覽器暫不支援計算上傳檔案的大小，確保上傳檔案不要超過2M，建議使用IE、FireFox、Chrome瀏覽器。";
- var browserCfg = {};
- var ua = window.navigator.userAgent;
- if (ua.indexOf("MSIE")>=1){
- browserCfg.ie = true;
- }else if(ua.indexOf("Firefox")>=1){
- browserCfg.firefox = true;
- }else if(ua.indexOf("Chrome")>=1){
- browserCfg.chrome = true;
- }
- function checkfile(){
- try{
- var obj_file = document.getElementById("fileuploade");
- if(obj_file.value==""){
- alert("請先選擇上傳檔案");
- return;
- }
- var filesize = 0;
- if(browserCfg.firefox || browserCfg.chrome ){
- filesize = obj_file.files[0].size;
- }else if(browserCfg.ie){
- var obj_img = document.getElementById('tempimg');
- obj_img.dynsrc=obj_file.value;
- filesize = obj_img.fileSize;
- }else{
- alert(tipMsg);
- return;
- }
- if(filesize==-1){
- alert(tipMsg);
- return;
- }else if(filesize>maxsize){
- alert(errMsg);
- return;
- }else{
- alert("檔案大小符合要求");
- return;
- }
- }catch(e){
- alert(e);
- }
- }
- </script>
- </html>