How to use JS to get the value of a cookie

2. How to use JS to get the value of a cookie

4. Read all cookies belonging to the current document

6. var allcookies = document. Cookie;

8. Defines a function that is used to read a specific cookie value.

10. function GetCookie (cookie_name)

12. {   

14. var allcookies = document. Cookie;

18. var cookie_pos = allcookies. indexOf (Cookie_name); Length of index

20. If an index is found, it represents the existence of a cookie,

22. Conversely, the description does not exist.

24. if (cookie_pos! =-1)

26. {

28. Put the Cookie_pos at the beginning of the value, just add 1 to the value.

30. Cookie_pos + = cookie_name.length + 1; Here I have tried it, prone to problems, so please refer to the time yourself to study it well ...

32. var cookie_end = allcookies. indexOf (";", Cookie_pos);

34. if (cookie_end = =-1)

36. {

38. cookie_end = allcookies. length;   

40. }

42. var value = unescape(allcookies.substring (Cookie_pos, cookie_end));  Here you can get the value of the cookie you want ...

44. }

46. return value;

48. }

50. Calling functions

52. var cookie_val = getcookie("username");

How to use JS to get the value of a cookie