RE: Data Validation

[Gary Longford]

Jerry,

Here's one I wrote earlier, hope it helps:

function CheckIsNumber(objCheck) {
        var strStartFormat = ".+-0123456789";
        var strNumberFormat = ".0123456789";
        var strCheckChar;
        var blnDecimal = false;
        var blnDigits = false;

    if (objCheck.length == 0)
        return true;

        strCheckChar = strStartFormat.indexOf(objCheck.charAt(0))
        if (strCheckChar == 0)
            blnDecimal = true;
        else if (strCheckChar < 0)
                return false;
        
        for (var i = 1; i < objCheck.length; i++) {
                strCheckChar = strNumberFormat.indexOf(objCheck.charAt(i))
                if (strCheckChar < 0)
                        return false;
                else if (strCheckChar == 0) {
                        if (blnDecimal)         // Second decimal.
                                return false;
                        else
                                blnDecimal = true; }
                else
                        blnDigits = true; }     
    return true;
}


If you need to go one stage further to integer add this one:

function tmo_IsInteger(objCheck) {
        var strDecimalFormat = ".";
        var strCheckChar;

    if (objCheck.length == 0) 
        return true; 
                
        strCheckChar = objCheck.indexOf(strDecimalFormat)
        
    if (strCheckChar < 1) 
                return CheckIsNumber(objCheck); 
    else 
                return false; 
}

Try that.

Gary

-----Original Message-----
From: Jerry Staple [mailto:[EMAIL PROTECTED]]
Sent: 03 July 2001 09:39
To: CF-Talk
Subject: Data Validation


Hi, 
Could someone inform me the best Javascript fucntion to check the value
of a textbox and to make sure the value entered is a number.

Much Apreciated

Jerry Staple
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