function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@");
dotpos=value.lastIndexOf(".");
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false;}
else {return true;}
}
}

function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}

function validate_contact(thisform)
{
	with (thisform)
 		{
		if (validate_required(email,"Please enter a value for the \"Email Address\" field.")==false)
 			{email.focus();return false}
		}
		
	with (thisform)
 		{
		if (validate_email(email,"Not a valid e-mail address!")==false)
			{email.focus();return false;}
		}

	with (thisform)
 		{
		if (validate_required(firstname,"Please enter a value for the \"First Name\" field.")==false)
 			{firstname.focus();return false}
		}
						
	with (thisform)
 		{
		if (validate_required(lastname,"Please enter a value for the \"Last Name\" field.")==false)
 			{lastname.focus();return false}
		}
						
	with (thisform)
 		{
		if (validate_required(phone,"Please enter a value for the \"Phone Number\" field.")==false)
 			{phone.focus();return false}
		}
						
 	with (thisform)
 		{
 		if (validate_required(messagesubject,"Please enter a value for the \"Subject\" field.")==false)
 			{messagesubject.focus();return false}
 		}
		
 	with (thisform)
 		{
 		if (validate_required(message,"Please enter a value for the \"Message\" field.")==false)
 			{message.focus();return false}
 		}

}