function disableField()
{
var a = document.forms["myForm"]["donate_type"].value;

	if (a =="pet")
	{
		document.getElementById("money").disable=true;
		document.getElementById("service").disable=true;
		document.getElementById("pet").disable=false;
	}

	if (a =="monetary")
	{
		document.getElementById("money").disable=true;
		document.getElementById("service").disable=false;
		document.getElementById("pet").disable=true;
	}

	if (a =="service")
	{
		document.getElementById("money").disable=true;
		document.getElementById("service").disable=false;
		document.getElementById("pet").disable=true;
	}