/* Validate the form */
		function validateQuote(f){
			// Set the flag to indicate if all ok
			var bPass = true;

			// Check that the required fields have data present
			bPass = CheckForInput(f.name, "") ? bPass : false;
			bPass = CheckForInput(f.submit_by, "") ? bPass : false;
			bPass = CheckForInput(f.telephone, "") ? bPass : false;
		
			// If there was an error
			if(!bPass) {
				alert('Please complete the highlighted fields as these are mandatory.');
				return false;
			}
			
			// Check that the email is valid
			if(!validateEmail(f.submit_by.value)){ 
				f.submit_by.style.backgroundColor = 'lightblue';
				alert('Please enter a valid email.'); 
				return false; 
			}
		
			// If all ok, return true
			return true;
		}

		/* Called to check that a required field is present */
		// Returns true/false depending on if data present
		function CheckForInput(inp, value2check){
			// Check that there is data
			if(stripWhitespace(inp.value) == value2check){
				// Highlight the background color if fail
				inp.style.backgroundColor = 'lightblue';
				return false;
			}else{
				// Remove the background color if ok
				inp.style.backgroundColor = 'white';
				return true;
			}
		}
		
		/* Remove white space from start & end of string */
		function stripWhitespace(str) {
			str = this != window ? this : str;
			return str.replace(/^\s+/g, '').replace(/\s+$/g, '');
		}
		
		/* Function to validate an email address */
		function validateEmail(email) {
		  var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
		  return regex.test(email);
		}