function validate_required(field,alerttxt)
{
	with (field)
	{
		if (value==null||value=="")
	  {
	  	document.getElementById("subNav").innerHTML = alerttxt;
	  	return false;
	  }
		else 
		{
			return true;
		}
	}
}

function validate_form(thisform)
{
	with (thisform)
	{
		if (validate_required(name,"<p id=\"mssg\">Please complete the 'Name' field</p>")==false)
	  {
	  	name.focus();
	  	return false;
	  }
		if (validate_required(tel,"<p id=\"mssg\">Please complete the 'Phone' field</p>")==false)
	  {
	  	tel.focus();
	  	return false;
	  }
		if (validate_required(message,"<p id=\"mssg\">Please complete the 'Message' field</p>")==false)
	  {
	  	message.focus();
	  	return false;
	  }
	}
}