How do i check to see if a field contains any non-numeric characters?

[#1]

I want to pull a value from a field and perform calculations on it but if the field contains any non-numeric characters I want it to do nothing.

[#2]

I want to pull a value from a field and perform calculations on it but if the field contains any non-numeric characters I want it to do nothing.

[#3 · Accepted solution]

You can use a regular expression for this. For example:

var v = this.getField("Text1").valueAsString;
if (/\D/.test(v)) {
    // the field contains non-numeric characters
} else {
    // the field is empty or contains only numeric characters
}