javascript loop variable substituion

Question

I need to use the javascript loop variable i in the loop block.

    for (i=0; i<=4; i++)
        {
            status=!status; 
            document.Form_Users.DefaultUser1_UserName.disabled = status;
            document.Form_Users.DefaultUser1_Password.disabled = status;
        }

what i need is :

       document.Form_Users.DefaultUser{i}_UserName.disabled = status;

ie, I could substitute the value of i insted of 1.

I thank all of you in advance.

iambriansreed · Accepted Answer · 2012-06-17 07:33:08Z

1

Try this:

for (i=1; i<5; i++)
    {
        status=!status; 
        document.Form_Users['DefaultUser'+i+'_UserName'].disabled = status;
        document.Form_Users['DefaultUser'+i+'_Password'].disabled = status;
    }

The loop starts with 1 and ends after 4.

edited Jun 17, 2012 at 7:33

iambriansreed

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answered Jun 17, 2012 at 7:17

Kundan Singh Chouhan

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5 Comments

Abel Jojo Over a year ago

Thanks, But is doen't produce what i need. Your code output such as function enable_text(status) { for (i=0; i<=4; i++) { status=!status; document.Form_Users["DefaultUser" + i + "_UserName"].disabled = status; document.Form_Users["DefaultUser" + i + "_Password"].disabled = status; } }

iambriansreed Over a year ago

@mplungjan Added the whole shabang with i starting at 1 in the loop. Make sense?

mplungjan Over a year ago

Remove the status from inside the loop or every second will be disabled

Abel Jojo Over a year ago

@mplungjan yes it will be disabled!!

mplungjan Over a year ago

No - every SECOND element will be disabled.

mplungjan · Accepted Answer · 2012-06-17 07:31:15Z

0

Suggestion:

Give them all the same name like
DefaultUser_UserName[]
DefaultUser_Password[]

then you can look over document.Form_Users["DefaultUser_UserName[]"]

and if you use PHP on the backend, you even get the array for free

function enable_text(status)
  var defaultUsers = document.Form_Users["DefaultUser_UserName[]"];
  var defaultUsers = document.Form_Users["DefaultUser_Password[]"];
  status=!status; 
  for (var i=0, n=defaultUsers.length; i<n; i++) {
    defaultUsers[i].disabled = status;
    defaultPass[i].disabled = status;
  }
}

answered Jun 17, 2012 at 7:31

mplungjan

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Comments

dhh · Accepted Answer · 2012-06-17 07:16:40Z

0

Have you tried out

document.Form_Users["DefaultUser"+i+"_UserName"]["disabled"] = status;

answered Jun 17, 2012 at 7:16

dhh

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Comments

Art · Accepted Answer · 2012-06-17 07:29:31Z

0

You can do it like so:

document.Form_Users["DefaultUser" + i + "_UserName"].disabled = status;
document.Form_Users["DefaultUser" + i + "_Password"].disabled = status;

edited Jun 17, 2012 at 7:29

answered Jun 17, 2012 at 7:17

Art

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