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

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_form(thisform) {
	with (thisform) {
		if (validate_required(firstname,"Please enter a first name.")==false)
		  {firstname.focus();return false;}
		if (validate_required(lastname,"Please enter a last name.")==false)
		  {lastname.focus();return false;}
		if (validate_required(email,"Please enter an email address.")==false)
		  {email.focus();return false;}
		if (validate_email(email,"Please enter a valid email address.")==false)
		  {email.focus();return false;}
		if (validate_required(address,"Please provide an address.")==false)
		  {address.focus();return false;}
		if (validate_required(city,"Please add a city.")==false)
		  {city.focus();return false;}
		if (validate_required(state,"Please add state.")==false)
		  {state.focus();return false;}
		if (validate_required(ZIP,"Please add a ZIP code.")==false)
		  {ZIP.focus();return false;}

	}
}