function controlEnter (obj, event)
                        {      
                            var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;      
                            if (keyCode == 13)
                            {                  
                                __doPostBack(obj, '');
                                return false;      
                            }      
                            else  {
                                return true; 
                            } 
                        }
                        
                        function WatermarkFocus(txtElem, strWatermark) {
                            if (txtElem.value == strWatermark) {
                                txtElem.value = '';
                                txtElem.style.color = 'Black';
                            }
                        }
                        
                        function WatermarkBlur(txtElem, strWatermark) {
                            if (txtElem.value == '') { 
                                txtElem.value = strWatermark;
                                txtElem.style.color = 'Gray';
                            }
                        }