function validate_form(field)
{
	var vname = document.vistaEmail.vname.value;
	var vemail1 = document.vistaEmail.vemail1.value;
	var vemail2 = document.vistaEmail.vemail2.value;
	var vlanguage = document.vistaEmail.vlanguage.options[document.vistaEmail.vlanguage.selectedIndex].value;

	if ((vname==null||vname==""))
	{
		alert("Please fill in your name");
		return false
	}
	else if ((vemail1==null||vemail1=="") || (vemail2==null||vemail2==""))
	{
		alert("Please fill in your email address");
		return false
	}
	else if ((vemail1!=vemail2))
	{
		alert("Please retype your email address, the email address must be the same in both fields");
		return false
	}
	else
	{
		return true
	}

}