harfagri

function checkInput (elementRef) {  

            var keyCodeEntered = (event.which) ? event.which : (window.event.keyCode) ? window.event.keyCode : -1;  

            if ((keyCodeEntered >= 48) && (keyCodeEntered <= 57)) {
                return true; 

            } else if (keyCodeEntered == 46) {

                if ((elementRef.value) && (elementRef.value.indexOf('.') >= 0)) { 
                   return false;
                } else { 
                   return true; 
                } 
            }
            return false;  
        }