function checkdata() {
	with(document.form1) {	
	        if (name.value == "") {
			alert("Please, inform your name!");
			name.focus();
			return false; }
			
			if (email.value == "") {
			alert("Please, inform your e-mail!");
			email.focus();
			return false; }
			
//validar email(verificao de endereco eletrônico)

parte1 = email.value.indexOf("@");
parte2 = email.value.indexOf(".");
parte3 = email.value.length;
if (!(parte1 >= 3 && parte2 >= 6 && parte3 >= 9)) {
alert ("Please, inform a valid e-mail!");
email.focus();
return false;}
			
			if (dob.value == "") {
			alert("Please, inform your date of birth!");
			dob.focus();
			return false; }
			
			if (city.value == "") {
			alert("Please, inform your city!");
			city.focus();
			return false; }
			
			if (state.value == "") {
			alert("Please, inform your State!");
			state.focus();
			return false; }
			
			if (country.value == "") {
			alert("Please, inform your country!");
			country.focus();
			return false; }
			
			if (destinations.value == "") {
			alert("Please, inform the destination!");
			destinations.focus();
			return false; }
			
			if (startDay.value == "") {
			alert("Please, check the day of start!");
			startDay.focus();
			return false; }
			
			if (startMonth.value == "") {
			alert("Please, check the month of start!");
			startMonth.focus();
			return false; }
			
			if (startYear.value == "") {
			alert("Please, check the year of start!");
			startYear.focus();
			return false; }
			
			if (numberDays.value == "") {
			alert("Please, inform the number of days!");
			numberDays.focus();
			return false; }
			
			if (numberPeople.value == "") {
			alert("Please, inform the number of people!");
			numberPeople.focus();
			return false; }
			
			if (numberSurfers.value == "") {
			alert("Please, inform the number of surfers!");
			numberSurfers.focus();
			return false; }
			
			if (keen.value == "") {
			alert("Please, inform how keen you are!");
			keen.focus();
			return false; }
			
			
			
                        submit();
	}
}