how to focus cursor on textbox?

Question

1.00/5 (1 vote)

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This is my code in javascript to validate whether the textBox is empty or not,
it works fine but after validating it jumps to next textbox, I want my cursor to be pointing on the same textBox untill he enters the correct input.

function trainNoName(txt)
{
  var trainNo=txt.value;
  if(trainNo=="")
  {
  alert(txt.name+" Field Can't be empty");
  document.getElementById("stFrm").focus();
  }
}

//i have used focus() in my last line but its not working.

Posted 15-Feb-12 22:39pm

The Doer

Updated 16-Feb-12 5:55am

fjdiewornncalwe

v4

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3 solutions

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Varun Sareen · Answer 1 · 2012-02-15T22:46:00

Solution 2

Try this:-

function trainNoName(txt)
{
  var txtTN=document.getElementById(txt);
  var trainNo=txtTN.value;
  if(trainNo==''){
  alert('Train No Field Cannot be empty');
  document.getElementById(txtTN).focus();
  }
}

I hope this will work.

Posted 15-Feb-12 22:46pm

Varun Sareen

Updated 16-Feb-12 5:56am

v3

Comments

The Doer 16-Feb-12 4:49am

no its not working..:(

Varun Sareen 16-Feb-12 11:55am

try my code again. I have modified a bit

fjdiewornncalwe 16-Feb-12 11:57am

Sorry, couldn't help myself. I had to change can't to cannot in your literal string so that the syntax highlighting looks better. Cheers. +5.

Varun Sareen 16-Feb-12 12:00pm

ohh thanks marcus..5 to you also

The Doer 20-Feb-12 6:37am

no varun its not working.., am using mozilla..

CRDave1988 · Answer 2 · 2012-02-15T22:43:00

Solution 1

Use your mind.

use if()...else....

Posted 15-Feb-12 22:43pm

CRDave1988

Updated 15-Feb-12 22:44pm

v2

Comments

The Doer 16-Feb-12 4:53am

eventhough its not.

Graham Breach · Answer 3 · 2012-02-15T23:22:00

Solution 3

I'll assume that txt is the input, since you are accessing txt.value and txt.name:

JavaScript

function trainNoName(txt) {
   var trainNo=txt.value;
   if(trainNo=="") {
      alert(txt.name+" Field Can't be empty");
      txt.focus();
   }
}

Posted 15-Feb-12 23:22pm

Graham Breach

Comments

The Doer 20-Feb-12 6:41am

no its not working..:(

how to focus cursor on textbox?

3 solutions

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Solution 1

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how to focus cursor on textbox?

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