I am working on asp.net project. I have a search textbox in it. when I search first time it work properly. Then after refresh the page textbox value is not clearing. 

```js
protected void Page_Load(object sender, EventArgs e)
        {            
            if (!Page.IsPostBack)
            {                
                txtEmployeeID.Text = string.Empty;
            }
            txtEmployeeID.Focus();                        
        }
```