JS restricts the size of locally uploaded files (supports IE6, Firefox Google)

First, ie must use activexobject to access local files. This requires lowering the security level of the browser. Then the key is how to obtain the local path in IE8.

 

[HTML]View plaincopyprint?

1. <Input id = "upload_img" type = "file" onchange = "onuploadimgchange (this)"/>

<input id="upload_img" type="file" onchange="onUploadImgChange(this)" />  

 

 

[JavaScript]View plaincopyprint?

1. Fileinput. Select ();
2. VaR url = Document. selection. createRange (). text;
3. $ ('# Imagetest'). ATTR ('src', URL );
4. Try {
5. VaR FSO = new activexobject ("scripting. FileSystemObject ");
6. }
7. Catch (E)
8. {
9. Alert ('If you are using IE8, please lower the security level! ');
10. }
11. Alert ("file size:" + FSO. GetFile (URL). size );

Fileinput. select (); var url = document. selection. createRange (). text; $ ('# imagetest '). ATTR ('src', URL); try {var FSO = new activexobject ("scripting. fileSystemObject ");} catch (e) {alert ('if you are using IE8, please lower the security level! ');} Alert ("file size:" + FSO. GetFile (URL). size );

For Firefox, Google, and other new-generation browsers, fileinput. files can be used to obtain the object array of file.

 

 

[JavaScript]View plaincopyprint?

1. If (fileinput. Files & fileinput. Files [0]) {
2. Alert (fileinput );
3. Alert (fileinput. Files [0])
4. Alert ('file size you selected '+ fileinput. Files [0]. size );
5. VaR xx = fileinput. Files [0];
6. For (var I in XX)
7. {
8. Alert (XX [I])
9. }
10. }

If (fileinput. files & fileinput. files [0]) {alert (fileinput); alert (fileinput. files [0]) Alert ('file size you selected '+ fileinput. files [0]. size); var xx = fileinput. files [0]; for (var I in XX) {alert (XX [I])}

The following is an example of a completed test.

 

[HTML]View plaincopyprint?

1. <Input id = "upload_img" type = "file" onchange = "onuploadimgchange (this)"/>
3. <SCRIPT type = "text/JavaScript">
4. Function onuploadimgchange (fileinput ){
5. VaR filepath = fileinput. value;
6. VaR fileext = filepath. substring (filepath. lastindexof ("."))
7. . Tolowercase ();
9. If (! Checkfileext (fileext ))
11. {
12. Alert ("the file you uploaded is not an image. please upload it again! ");
13. Return;
14. }
15. If (fileinput. Files & fileinput. Files [0]) {
16. Alert (fileinput );
17. Alert (fileinput. Files [0])
18. Alert ('file size you selected '+ fileinput. Files [0]. size );
19. VaR xx = fileinput. Files [0];
20. For (var I in XX ){
21. Alert (XX [I])
22. }
23. } Else {
24. Fileinput. Select ();
25. VaR url = Document. selection. createRange (). text;
26. Try {
27. VaR FSO = new activexobject ("scripting. FileSystemObject ");
28. } Catch (e ){
29. Alert ('If you are using IE, please lower the security level! ');
30. }
31. Alert ("file size:" + FSO. GetFile (URL). size );
32. }
33. }
34. Function checkfileext (EXT)
36. {
37. If (! Ext. Match (/. jpg |. gif |. PNG |. BMP/I )){
38. Return false;
39. }
40. Return true;
41. }
42. </SCRIPT>