function isEmail(elm) {
    if (elm.value.indexOf("@") == "-1" || elm.value.indexOf(".") == "-1" || elm.value == "")
    return true;
    else return false;
}

function checkData() {
  	if (document.form1.firstname.value.length == 0) {
		alert("Please enter your First Name. ");
		document.form1.firstname.focus();
       return false;
	};
	
	if (document.form1.surname.value.length == 0) {
		alert("Please enter your Surname. ");
		document.form1.surname.focus();
       return false;
	};
	
	if (document.form1.address.value.length == 0) {
		alert("Please enter your Address. ");
		document.form1.address.focus();
       return false;
	};
	
	if (document.form1.country.value.length == 0) {
		alert("Please enter your Country Name. ");
		document.form1.country.focus();
       return false;
	};
	
	if (document.form1.pcode.value.length == 0) {
		alert("Please enter your Postal Code. ");
		document.form1.pcode.focus();
       return false;
	};
	
	if (document.form1.countrycode.value.length == 0) {
		alert("Please enter your Country Code. ");
		document.form1.countrycode.focus();
       return false;
	};
	
	if (document.form1.homephone.value.length == 0) {
		alert("Please enter your Home Phone. ");
		document.form1.homephone.focus();
       return false;
	};
	
	if (isEmail(document.form1.email) == true) {
       alert("Please enter a valid Email address.");
		document.form1.email.focus();
       return false;
    };

	return true;
}