function validation() { 
            var name=document.contactus.name.value;
            var address=document.contactus.address.value;
            var country=document.contactus.country.value;
            var email=document.contactus.email.value;
            var telephone=document.contactus.telephone.value;
            var comments=document.contactus.comments.value;

            name=name.replace(/^\s*|\s*$/g,"");
            address=address.replace(/^\s*|\s*$/g,"");
            country=country.replace(/^\s*|\s*$/g,"");
            email=email.replace(/^\s*|\s*$/g,"");
            telephone=telephone.replace(/^\s*|\s*$/g,"");
            comments=comments.replace(/^\s*|\s*$/g,"");

            if (name == '') {
            alert("Please Fill Proper Name!");
            document.contactus.name.focus();
            return false;
            }

            if (address == '') {
            alert("Please Fill Proper Address!");
            document.contactus.address.focus();
            return false;
            }
            if (country == '') {
            alert("Please Fill Country!");
            document.contactus.country.focus();
            return false;
            }
            if (telephone=='' || isNaN(telephone)) {
            alert("Please Fill Proper Telephone!");
            document.contactus.telephone.focus();
            return false;
            }
            
            if (email == '' || isValidEmail(email)==false) {
            alert("Please Fill Proper Email!");
            document.contactus.email.focus();
            return false;
            }
            }

            function isValidEmail(str) {
            return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
            }