function checkform() 
{
	if (document.agent_opp.contactname.value == "") {
		alert("Please enter a contact name.");
		input.focus();
		return false;
	}
	if (document.agent_opp.phone.value == "") {
		alert("Please enter a phone number.");
		input.focus();
		return false;
	}
	if (document.agent_opp.email.value == "") {
		alert("Please enter an email.");
		input.focus();
		return false;
	}
	return true;
}