Random delay in seconds from numericupdown in VB.Net

I have:

1. min.NumericUpDown.Text


2. max.NumericUpDown.Text


3. webbrowser1


4. url.Text


5. goButton

Is something what coul pick min. and max. value from NumericUpDown.Text and reload my webbrowser1?

• What I try to understand is how to make loading webbrwser ad lets say stay on page random time in seconds picked up from my min.NumericUpDown.Text AND max.NumericUpDown.Text

thanks