Regex - Limit input to a positive number (float or int)

Hi!

I wish to limit the user input of and edittext to only allow a positive number, float or int. I do not yet know my Regex good enough to do this. I realize that I must get better at regex but in the meantime does any one know how to do this ?

I have used this so far on the edittext:

function checkTextInput() 
{ 
    if (this.text.match(/[^0-9.]/g)) 
    { 
        this.text = this.text.replace(/[^0-9.]/g, ""); 
    }  
}

Which matches

000.0001

0.45.000.1

...1

which is not desired.

Desired is

0.n

.n

n.n

Best Regards,

Johan