function change_image(img_name, img_src)
{
   document[img_name].src = img_src;
}

function searchDisplay() {
  var status = document.search.status.options[document.search.status.selectedIndex].value;

  if (status=="sale"){
  	searchsalediv.style.display = "block";
  	searchrentdiv.style.display = "none";
	}
  else if (status=="rent"){
  	searchsalediv.style.display = "none";
  	searchrentdiv.style.display = "block";
  }

}

function checkSaleForm() {
	
	var qb = document.forms["qb"];	
		
	if (qb.name.value == "")
	{
	alert ("Please type in name!");
	qb.name.focus();
	return;
	}
	
	if (qb.tel.value == ""){
	alert ("Please type in telephone!");
	qb.tel.focus();
	return;
	}
	
	if (qb.email.value == ""){
	alert ("Please type in email!");
	qb.email.focus();
	return;
	}
	
	
	qb.submit();
}

function checkRentForm() {
	
	var qb = document.forms["qb"];	
		
	if (qb.name.value == "")
	{
	alert ("Please type in name!");
	qb.name.focus();
	return;
	}
	
	
	if (qb.email.value == ""){
	alert ("Please type in email!");
	qb.email.focus();
	return;
	}
	
	if (qb.tel.value == ""){
	alert ("Please type in telephone!");
	qb.tel.focus();
	return;
	}
	
	
	qb.submit();
}