01.function getExtension(filename){
02. var parts = filename.split('.');
03. return parts[parts.length - 1];
04.}
05.
06.function isImage(filename){
07. var ext = getExtension(filename);
08. switch(ext.toLowerCase()){
09. case 'jpg':
10. case 'gif':
11. case 'bmp':
12. case 'png':
13. return true;
14. }
15. return false;
16.}
17.
18.function isDoc(filename){
19. var ext = getExtension(filename);
20. switch(ext.toLowerCase()){
21. case 'doc':
22. case 'docx':
23. case 'pdf':
24. case 'xls':
25. case 'xlsx':
26. return true;
27. }
28. return false;
29.}
30.
31.function isZip(filename){
32. var ext = getExtension(filename);
33. switch(ext.toLowerCase()){
34. case 'rar':
35. case 'zip':
36. case '7z':
37. return true;
38. }
39. return false;
40.}
41.
42.function isTranscript(filename){
43. var ext = getExtension(filename);
44. switch(ext.toLowerCase()){
45. case 'jpg':
46. case 'pdf':
47. case 'gif':
48. return true;
49. }
50. return false;
51.}
