function visivel()
  {
  	var lista1=document.getElementById("pickup_list")
	var lista2=document.getElementById("dropoff_list")
	if(lista1.options[lista1.selectedIndex].text == "Other Location")
		document.getElementById("pickup").disabled=false;
  	else
		document.getElementById("pickup").disabled=true;
	
	if(lista2.options[lista2.selectedIndex].text == "Other Location")
		document.getElementById("dropoff").disabled=false;
  	else
		document.getElementById("dropoff").disabled=true;
  }