var currentZip = '79760';

function checkValues(form) {
	if ((form.MasterPage1_BodyContent__ctlKeyAndLoc__tbCity.value == '') &&
    	    (form.MasterPage1_BodyContent__ctlKeyAndLoc__tbZip.value == "") && 
	    (form.MasterPage1_BodyContent__ctlKeyAndLoc__dropRadius.selectedIndex == 0) &&
	    (form.MasterPage1_BodyContent__ctlKeyAndLoc__dropState.selectedIndex == 0)) {
		form.MasterPage1_BodyContent__ctlKeyAndLoc__tbZip.value = currentZip;
		form.MasterPage1_BodyContent__ctlKeyAndLoc__dropRadius.selectedIndex = 5;
	    }
}