function checkForm(){

	if (document.getElementById("F2").value==""){
		alert("Please provide your name and surname.");
		document.getElementById("F1").focus();
		return;
	}
        	if (document.getElementById("F7").value==""){
		alert("Please provide your e-mail address.");
		document.getElementById("F7").focus();
		return;
	}
/*	if (document.getElementById("F2").value==""){
		alert("Please provide your last name.");
		document.getElementById("F2").focus();
		return;
	}
	if (document.getElementById("mbr_organisation").value==""){
		alert("Please provide your organisation name.");
		document.getElementById("mbr_organisation").focus();
		return;
	}
	if (document.getElementById("mbr_address").value==""){
		alert("Please provide your address.");
		document.getElementById("mbr_address").focus();
		return;
	}
	if (document.getElementById("mbr_city").value==""){
		alert("Please provide your city.");
		document.getElementById("mbr_city").focus();
		return;
	}
	if (document.getElementById("mbr_postcode").value==""){
		alert("Please provide your post code.");
		document.getElementById("mbr_postcode").focus();
		return;
	}
	if (document.getElementById("mbr_country").value==""){
		alert("Please provide your country.");
		document.getElementById("mbr_country").focus();
		return;
	}
	if (document.getElementById("mbr_email").value==""){
		alert("Please provide your e-mail address.");
		document.getElementById("mbr_email").focus();
		return;
	}
	if (document.getElementById("mbr_phone").value==""){
		alert("Please provide your phone number.");
		document.getElementById("mbr_phone").focus();
		return;
	}
	if (document.getElementById("mbr_fax").value==""){
		alert("Please provide your fax number.");
		document.getElementById("mbr_fax").focus();
		return;
	}
	var sw1=document.getElementById("mbr_attendance_day1");
	var sw2=document.getElementById("mbr_attendance_day2");
	var sw3=document.getElementById("mbr_indust_tour1");
	if ((sw1.checked||sw2.checked)&&(sw3.checked)) {
	if (document.getElementById("mbr_payment_type").value==""){
		alert("Please choose a method of payment.");
		document.getElementById("mbr_payment_type").focus();
		return;
	}
	}
	if (document.getElementById("mbr_website").value==""){
		alert("Please provide your website address.");
		document.getElementById("mbr_website").focus();
		return;
	}
	if (document.getElementById("mbr_regist_fee").value==""){
		alert("Please provide registration fee.");
		document.getElementById("mbr_regist_fee").focus();
		return;
	}
	if (document.getElementById("mbr_payment_type").value=="card"){
		if (document.getElementById("mbr_cardno").value=="card"){
			alert("Please provide your credit card number.");
			document.getElementById("mbr_cardno").focus();
			return;
		}
		if (document.getElementById("mbr_cardno").value.length!=16){
			alert("Uncorrect credit card number.");
			document.getElementById("mbr_cardno").focus();
			return;
		}
		if (document.getElementById("mbr_cardholder").value==""){
			alert("Please provide cardholder name.");
			document.getElementById("mbr_cardholder").focus();
			return;
		}
	
		if (document.getElementById("mbr_cardhold_address").value==""){
			alert("Please provide cardholder address.");
			document.getElementById("mbr_cardhold_address").focus();
			return;
		}
		if (document.getElementById("mbr_cardexp_mm").value=="card"){
			alert("Please provide your credit card expiration month.");
			document.getElementById("mbr_cardexp_mm").focus();
			return;
		}
		if (document.getElementById("mbr_cardexp_yyyy").value=="card"){
			alert("Please provide credit card expiration year.");
			document.getElementById("mbr_cardexp_yyyy").focus();
			return;
		}
		if (document.getElementById("mbr_card_pin").value=="card"){
			alert("Please provide credit card pin.");
			document.getElementById("mbr_card_pin").focus();
			return;
		}
	}
	var checked = false;
	for (i=1; i<4; i++)
		var mbr_attendance_day = document.getElementById("mbr_attendance_day"+i);
		checked = checked || mbr_attendance_day.checked;
	if (!checked){
			alert("Please select the attendance days.");
			return;
	}
	checked = false;
	for (i=1; i<7; i++)
		var mbr_indust_tour = document.getElementById("mbr_indust_tour"+i);
		checked = checked || mbr_indust_tour.checked;
	if (!checked){
			alert("Please select industrial tours.");
			return;
	}
*/

	document.getElementById("frmForm1").submit();
}
//-------------------------------------------------------------------------------------------
function switch_status1(){
var swyes=document.getElementById("mbr_publish_me1");
var swno=document.getElementById("mbr_publish_me2");
if (swyes.checked){
	swno.checked=false;
}
else
	swno.checked=true;
}
//-------------------------------------------------------------------------------------------
function switch_status2(){
var swyes=document.getElementById("mbr_publish_me1");
var swno=document.getElementById("mbr_publish_me2");
if (swno.checked){
	swyes.checked=false;
}
else
	swyes.checked=true;

}
//-------------------------------------------------------------------------------------------
function switch_status3(sw){
var sw1=document.getElementById("mbr_attendance_day1");
var sw2=document.getElementById("mbr_attendance_day2");
var sw3=document.getElementById("mbr_attendance_day3");
var sel=document.getElementById("mbr_payment_type");
var sw5=document.getElementById("mbr_indust_tour5");
var sw6=document.getElementById("mbr_indust_tour1");
sw1.checked=false;
sw2.checked=false;
sw3.checked=false;
sw.checked=true;
sel.disabled=false;
if(sw.name==sw3.name) {
var oOption = document.createElement("OPTION");
oOption.text="";
oOption.value="";
oOption.selected=true;
sel.appendChild(oOption);
sel.disabled=true;
}
sw5.disabled=true;
sw5.checked=false;
if(sw.name==sw2.name && sw6.checked) {
sw5.disabled=false;
}
}
//-------------------------------------------------------------------------------------------
function switch_status4(sw){
var sw1=document.getElementById("mbr_indust_tour1");
var sw2=document.getElementById("mbr_indust_tour2");
var sw3=document.getElementById("mbr_indust_tour3");
var sw4=document.getElementById("mbr_indust_tour4");
var sel=document.getElementById("mbr_payment_type");
var sw5=document.getElementById("mbr_indust_tour5");
var sw6=document.getElementById("mbr_attendance_day2");
sw1.checked=false;
sw2.checked=false;
sw3.checked=false;
sw4.checked=false;
sw.checked=true;
sel.disabled=false;
if(sw.name!=sw1.name) {
var oOption = document.createElement("OPTION");
oOption.text="";
oOption.value="";
oOption.selected=true;
sel.appendChild(oOption);
sel.disabled=true;
}
sw5.disabled=true;
sw5.checked=false;
if(sw.name==sw1.name && sw6.checked) {
sw5.disabled=false;
}
}