function validate_form(what){

	valid = true;

	message = "One of more of the required fields are empty:"

	

	if ( document.form1.interestedin.selectedIndex == 0 ) {

		message += "\n - Subscription";

		valid = false;

	}

	if ( document.form1.firstname.value == "" ){

		message += "\n - First Name";

		valid = false;

	}

	if ( document.form1.lastname.value == "" ){

		message += "\n - Last Name";

		valid = false;

	}

	if ( document.form1.email.value == "" ){

		message += "\n - Email";

		valid = false;

	}

	if ( document.form1.address.value == "" ){

		message += "\n - Address";

		valid = false;

	}

	if ( document.form1.city.value == "" ){

		message += "\n - City";

		valid = false;

	}

	if ( document.form1.state.selectedIndex == 0 ){

		message += "\n - State.";

		valid = false;

	}

	if ( document.form1.zip.value == "" ){

		message += "\n - Zip Code.";

		valid = false;

	}

	

   if (document.form1.phone1.value == "" || !document.form1.phone1.value.toString().match(/^[-]?\d*\.?\d*$/)){ 

        message += "\n - Numeric characters only for Phone Number.";

    	valid = false;

	}



	if ( document.form1.phonetype.selectedIndex == 0 ){

		message += "\n - Phone Type";

		valid = false;

	}

	if ( document.form1.bestdescribesme.selectedIndex == 0 ){

		message += "\n - Role in the petro industry";

		valid = false;

	}

	if ( document.form1.lookingtobuy.selectedIndex == 0 ){

		message += "\n - If you are looking to buy a station";

		valid = false;

	}

	if ( document.form1.lookingtosell.selectedIndex == 0 ){

		message += "\n - If you are looking to sell a station.";

		valid = false;

	}

	

	if(valid == true){

		document.form1.submit();

	}else{

		alert(message);

	}

}