Update README.md

Author: Edward Xiao

README.md

@@ -81,7 +81,7 @@ Tested on IE9+ and Chrome and Safari(10.0.3)
 |**onBlur**                        |**Opt**|**Func**|**In order to validate the value on blur, you MUST provide a function, even if it is an empty function. Missing this, the validation on blur will not work.**|**none**    |
 |onFocus                           |  Opt  |  Func  |                                             |  none      |
 |onClick                           |  Opt  |  Func  |                                             |  none      |
-|onKeyUp                           |  Opt  |  Func  |                                             |  none      |
+|onKeyUp                           |  Opt  |  Func  | By providing ```onKeyUp```, the component will perform the checking every time when user types. |  none      |
 |**validationOption**              |**Opt**|**obj** |**validationOption object, see below**|**{}**      |
 |**validationOption.name**         |**Opt**|**Str** |**To display in the Error message. i.e Please enter your ${name}.**|**""**      |
 |**validationOption.check**        |**Opt**|**Bool**|**To determin if you need to validate.**|**true**    |
@@ -449,7 +449,7 @@ import 'react-inputs-validation/lib/react-inputs-validation.min.css';
 |**onBlur**                        |**Opt**|**Func**|**In order to validate the value on blur, you MUST provide a function, even if it is an empty function. Missing this, the validation on blur will not work.**|**none**    |
 |onFocus                           |  Opt  |  Func  |                                             |  none      |
 |onClick                           |  Opt  |  Func  |                                             |  none      |
-|onKeyUp                           |  Opt  |  Func  |                                             |  none      |
+|onKeyUp                           |  Opt  |  Func  | By providing ```onKeyUp```, the component will perform the checking every time when user types. |  none      |
 |**validationOption**              |**Opt**|**obj** |**validationOption object, see below**|**{}**      |
 |**validationOption.name**         |**Opt**|**Str** |**To display in the Error message. i.e Please enter your ${name}.**|**""**      |
 |**validationOption.check**        |**Opt**|**Bool**|**To determin if you need to validate.**|**true**    |