function UpdateRegions(menucode, x) {
	(menucode)?(MenuOBJ = document.sample.destregion):(MenuOBJ = document.sample.originregion);
	MenuOBJ.options.length = 0;  // empty current contents
	if (x.length == 0) {  // user has not selected a state
		MenuOBJ.options[0] = new Option("Choose state first", "Choose state first");
		MenuOBJ.disabled = true;
	}
	else {  // update regional dropdown
	    MenuOBJ.options[0] = new Option("within 50 miles of", "within 50 miles of");
		for (y = 0; y < Regions[x].length; y++) {
		    MenuOBJ.options[y + 1] = new Option(Regions[x][y][0], Regions[x][y][1]);
		}
		MenuOBJ.disabled = false;
	}
	MenuOBJ.selectedIndex = 0;
}