Numeric with decimal point

[jmcg]

I knwo little about javascipt and found this code elsewhere and looking to try to tweek.
It works fine in changing the value entered to numbers only but need to allow for a decimal place.
Is it possible to change this code to allow for a . decimal

function toNumber(checkString)
{
    newString = "";    // REVISED/CORRECTED STRING
    count = 0;         // COUNTER FOR LOOPING THROUGH STRING

    // LOOP THROUGH STRING CHARACTER BY CHARACTER
    for (i = 0; i < checkString.length; i++) {
        ch = checkString.substring(i, i+1);

        // ENSURE CHARACTER IS AN NUMBER
        if ((ch >= "0" && ch <= "9") || (ch = "")){
            newString += ch;
        }
    }

    return newString;
}

 

[LyndonOHRC]

Investigate isNaN()

"The isNaN() function is used to check if a value is not a number."

http://www.w3schools.com/jsref/jsref_isNaN.asp

Lyndon

---People Remember about 10% of what you say ---They never forget how you made them feel. Covey

 

[BillyRayPreachersSon]

Also investiagte "parseFloat" and possibly "parseInt", too.

Dan



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[jmcg]

Thanks BillyRay for the parseFloat, looks like the winner