In this chapter, You will learn to make a Date of birth counter into days, hours and time. Just follow the tutorial below and download the source code.

DIRECTIONS

Creating our HTML code

1. <FORM
   
   name
   
   =
   
   "live"
   
   >
   
2. 
   
3. <BR
   
   ><BR
   
   ><BR
   
   >
   
4. 
   
5. 
   
6. <TABLE
   
   border
   
   =
   
   1
   
   >
   
7. <tr
   
   >
   
8. <td
   
   ><INPUT
   
   TYPE
   
   =
   
   "button"
   
   NAME
   
   =
   
   "start"
   
   VALUE
   
   =
   
   "Start"
   
   ONCLICK
   
   =
   
   "lifetimer(this.form)"
   
   ></
   
   td
   
   >
   
9. <td
   
   ><INPUT
   
   TYPE
   
   =
   
   "reset"
   
   NAME
   
   =
   
   "resetb"
   
   VALUE
   
   =
   
   "Reset Age"
   
   ></
   
   td
   
   >
   
10. </
    
    tr
    
    >
    
11. <tr
    
    >
    
12. <td
    
    >
    
    Date of birth:</
    
    td
    
    >
    
13. <td
    
    ><INPUT
    
    TYPE
    
    =
    
    "text"
    
    NAME
    
    =
    
    "age"
    
    VALUE
    
    =
    
    ""
    
    SIZE
    
    =
    
    20
    
    placeholder=
    
    "January 10, 1994"
    
    >
    
    </
    
    td
    
    >
    
14. </
    
    tr
    
    >
    
15. <TR
    
    ><TD
    
    >
    
    You are days old:</
    
    TD
    
    >
    
16. 
    
17. <TD
    
    >
    
18. 
    
19. <INPUT
    
    TYPE
    
    =
    
    "text"
    
    NAME
    
    =
    
    "time1"
    
    VALUE
    
    =
    
    ""
    
    size
    
    =
    
    8
    
    >
    
20. 
    
21. </
    
    TD
    
    >
    
22. 
    
23. </
    
    TR
    
    >
    
24. 
    
25. <TR
    
    ><TD
    
    >
    
    Plus hours old:</
    
    TD
    
    >
    
26. 
    
27. <TD
    
    >
    
28. 
    
29. <INPUT
    
    TYPE
    
    =
    
    "text"
    
    NAME
    
    =
    
    "time2"
    
    VALUE
    
    =
    
    ""
    
    size
    
    =
    
    8
    
    >
    
30. 
    
31. </
    
    TD
    
    >
    
32. 
    
33. </
    
    TR
    
    >
    
34. 
    
35. <TR
    
    ><TD
    
    >
    
    Plus minutes old:</
    
    TD
    
    >
    
36. 
    
37. <TD
    
    ><INPUT
    
    TYPE
    
    =
    
    "text"
    
    NAME
    
    =
    
    "time3"
    
    VALUE
    
    =
    
    ""
    
    size
    
    =
    
    8
    
    ></
    
    TD
    
    >
    
38. 
    
39. </
    
    TR
    
    >
    
40. </
    
    TABLE
    
    >
    
41. </
    
    FORM
    
    >
    

Creating our javascript code

1. <
   
   SCRIPT LANGUAGE=
   
   "JAVASCRIPT"
   
   >
   
2. <!--
   
   hide this
   
   script tag's contents from old browsers
   
3. function lifetimer(){
   
4. 
   
5. today = new Date()
   
6. 
   
7. BirthDay = new Date(document.live.age.value)
   
8. 
   
9. timeold = (today.getTime() - BirthDay.getTime());
   
10. 
    
11. sectimeold = timeold / 1000;
    
12. 
    
13. secondsold = Math.floor(sectimeold);
    
14. 
    
15. msPerDay = 24 * 60 * 60 * 1000 ;
    
16. 
    
17. timeold = (today.getTime() - BirthDay.getTime());
    
18. 
    
19. e_daysold = timeold / msPerDay;
    
20. 
    
21. daysold = Math.floor(e_daysold);
    
22. 
    
23. e_hrsold = (e_daysold - daysold)*24;
    
24. 
    
25. hrsold = Math.floor(e_hrsold);
    
26. 
    
27. minsold = Math.floor((e_hrsold - hrsold)*60);
    
28. 
    
29. document.live.time1.value = daysold
    
30. 
    
31. document.live.time2.value = hrsold
    
32. 
    
33. document.live.time3.value = minsold
    
34. 
    
35. window.status = "Well at the moment you are " + secondsold + "............ seconds old.";
    
36. 
    
37. timerID = setTimeout("lifetimer()",1000)
    
38. 
    
39. }
    
40. // -- done hiding from old browsers -->
    
41. 
    
42. </script>
    

You have now created a date counter that counts days, hours and minutes between the date today and the date you entered. For more suggestions and questions feel free to comment below or email me at [email protected]

Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

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