function validate_form() {
            valid = true;
            var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
            var em = document.callback.Email.value;

            if (document.callback.Name.value == "") {
                alert("Please provide Your Name");
                return false;
                valid = false;
            }

            if (reg.test(em) == false) {
                alert('Please enter a properly formatted email address');
                return false;
                valid = false;
            }

            if (document.callback.ContactNum.value == "") {
                alert("Please provide Your Phone No");
                return false;
                valid = false;
            }
            
            if (document.callback.Comment.value == "") {
                alert("Please provide Your Comments");
                return false;
                valid = false;
            }


            if (valid == true)
                return true;
        }
        
        
        function bivalidate_form() {
            valid = true;
            var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
            var em = document.bicallback.biEmail.value;

            if (document.bicallback.biName.value == "") {
                alert("Please provide Your Name");
                return false;
                valid = false;
            }

            if (reg.test(em) == false) {
                alert('Please enter a properly formatted email address');
                return false;
                valid = false;
            }

            if (document.bicallback.biContactNum.value == "") {
                alert("Please provide Your Phone No");
                return false;
                valid = false;
            }
            
            if (document.bicallback.biComment.value == "") {
                alert("Please provide Your Comments");
                return false;
                valid = false;
            }


            if (valid == true)
                return true;
        }