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Copying an input field automatically

Featured Replies

Hey,

 

In Javascript I am trying to copy whatever value the user enters into one form text field to copy into another text field, but I am not sure how to achieve this. I don't know javascript very well, but understand the general syntax.

 

Thanks!

  • Author

I have managed to do it this way:

 

function upperCase(x)

{

var y=document.getElementById(x).value

document.getElementById("lname").value=y.toLowerCase()

var a=document.getElementById(x).value

document.getElementById("fname").value=a.toLowerCase()

}

 

I don't really want to use toLowerCase() I just want it to write the value, but this is the best was I could find. Is there a better way to do this?

I'm not much of a JS superhero ... but ...

You can use the "onkeyup" property of that field to do it character by character or "onblur" to do it after all the text has been entered and the user exists that field:

 

Sample html:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<script type="text/javascript">
function copy()
{
document.getElementById("field2").value = document.getElementById("field1").value;
}
</script>
<body>

<input type="text" id="field1" onkeyup="copy()" />

<input type="text" id="field2" />

</body>
</html>

  • Author

Thanks for that, JS is on my list to learn more :)

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