moving from one textfield to another

[overDeveloper]

I want to have focus shifted from the one that has focus to another once a certain amount of characters has been entered. I have tried:

<input .... onkeyup="if (document.GetElementById['field1'].length == 3) {document.GetElementById['field2'].focus();}"

But I get an error saying that document.GetElementById.field1 is null or not an object.. any help?

 

[theniteowl]

The G should be g and the [] should be ().
Also make certain you have a corresponding id tag in the input fields.

<input .... onkeyup="if (document.[COLOR=red]g[/color]etElementById[COLOR=red]([/color]'field1'[COLOR=red])[/color].length == 3) {document.[COLOR=red]g[/color]etElementById[COLOR=red]([/color]'field2'[COLOR=red])[/color].focus();}"

At my age I still learn something new every day, but I forget two others.

 

[theniteowl]

Oh, and document.getElementById('field1').length
should be: document.getElementById('field1').value.length

At my age I still learn something new every day, but I forget two others.