function valid(){
a = document.bookingform;


if(a.surname.value==""){
alert("Please enter your Surame");
a.surname.focus();
a.surname.select();
return false;
}

if(a.firstname.value==""){
alert("Please enter your First Name");
a.firstname.focus();
a.firstname.select();
return false;
}

if(a.position.value==""){
alert("Please enter your Position");
a.position.focus();
a.position.select();
return false;
}

if(a.collegename.value==""){
alert("Please enter your College Name");
a.collegename.focus();
a.collegename.select();
return false;
}

if(a.collegeaddress.value==""){
alert("Please enter your College Addresse");
a.collegeaddress.focus();
a.collegeaddress.select();
return false;
}

if(a.email.value==""){
alert("Please enter your Email");
a.email.focus();
a.email.select();
return false;
}else{
	var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
	var returnval = emailfilter.test(a.email.value)
	if ( ! returnval ){
		alert("Please enter a valid email address.")
		a.email.select();
		return false;
	}
}
	
if(a.telephonenumber.value ==""  ){
	alert("Please enter your Telephone Number.");
a.telephonenumber.focus();
a.telephonenumber.select();
return false;
}else{
if(isNaN(a.telephonenumber.value)  ){
alert("Please enter Telephone Number without space.");
a.telephonenumber.focus();
a.telephonenumber.select();
return false;
}
}
if(a.budget.value==""){
alert("Please enter your Budget holder for invoice");
a.budget.focus();
a.budget.select();
return false;
}

if(a.title.value==""){
alert("Please enter your Course Title");
a.title.focus();
a.title.select();
return false;
}


if(a.venue.value==""){
alert("Please enter your Course Venue");
a.venue.focus();
a.venue.select();
return false;
}


if(a.date.value==""){
alert("Please enter your Course Date");
a.date.focus();
a.date.select();
return false;
}

if(a.specialdietry.value==""){
alert("Please enter your Any special dietary or other needs?");
a.specialdietry.focus();
a.specialdietry.select();
return false;
}
return true;
}
function is_digit(value){
	if( value.search(/\D/) != -1 || value == "" ){ return true; }else{ return false; }
}