Allowing only numbers and one decimal

Question

Guys and gals i have this piece of JavaScript code that only allows for numbers and one decimal period. The problem i\'m having is that when i tab over to my textbox contro

Answer 1

If you can't use an already stable and well-know library, you can try something like this:

document.write('');

function run(field) {
    setTimeout(function() {
        var regex = /\d*\.?\d?/g;
        field.value = regex.exec(field.value);
    }, 0);
}

I know it doesn't prevent the wrong char to appear, but it works.

PS: that setTimeout(..., 0) is a trick to execute the function after the value of the field has already been modified.