Hi,
I have 2 dropdowns and a submit button.Depending on what ever value the user selects from the 2 dropdowns that submit button will be shown.Only one pair of selected values from the dropdowns becomes a condition for the submit button to be seen.If the user changes the value of the dropdowns to any other ......the submit button shouldnt be seen.
can somebody plz explain me how to do this?

bit of pseudocode

if (select1.selectedIndex == value1 && select2.selectedIndex == value2) {
submitbutton.disabled = false;
} else {
submitbutton.disabled = true;
}