Validating spaces in a textbox

[uicouic]

Hi all. Need help with validating spaces in a textbox using JavaScript. The textbox cannot contain just spaces only.

If not, upon clicking a save button it will display an alert: "Spaces only not allowed."

Please advise, thanks. Any help greatly appreciated.

[Dormilich]

you can use a regular expression for that.

/^\s+$/

will test for "spaces only" (well, of course you have to apply the appropriate functions too)

[uicouic]

Sorry, but is it something like this?

function validateSpaces() {
    if (myStr == myStr.replace(/^\s+$/) {
strMessage += "<li>Spaces only not allowed.<br>";
blnAllOkay = false;
}

    if (blnAllOkay != true) {
    window.event.returnValue=false;
    lblMessage.innerHTML = strMessage;
    }
}
}

[Dormilich]

probably RegEx.test() rather than String.replace( ).

[uicouic]

Its working now. Thanks alot Dormilich!

Cheers! :)