function doSend(){
				if(!document.request_quote.form_name.value){
					alert('Please fill in your name');
					document.request_quote.form_name.focus();
				}
				else if(!document.request_quote.form_company.value){
					alert('Please type in your company name');
					document.request_quote.form_company.focus();
				}
				else if(!document.request_quote.form_email.value){
					alert('Please fill in your e-mail address');
					document.request_quote.form_email.focus();
				}
				else if(!validateEmail(document.request_quote.form_email.value)){
					alert('You have entered an incorrect e-mail address, please type it in again');
					document.request_quote.form_email.select();
				}
				else if(!document.request_quote.form_aircrafttype.value){
					alert('Please provide us with the aircraft type');
					document.request_quote.form_aircrafttype.focus();
				}
				else{
					document.request_quote.send.disabled = true;
					document.request_quote.submit();
				}
			}
			
			function validateEmail(str) {
				var index = str.indexOf("@")
				if ( (index < 1) ||
					 (str.indexOf(".") < 1) ||
					 (str.indexOf("\"") > -1) ||
					 (str.indexOf("'") > -1) ||
					 (str.length < 5) ||
					 ((index > 2) && (str.indexOf("@", index+1) != -1)) )
						return false;
					
				return true;
			}