Get key press events using JavaScript

Get Key Press Events Using JavaScript
script language="javascript" type="text/javascript"

function CheckPressedKey(Key)

{
switch(KeyID)
{
case 13:
alert("Key Pressed: Enter");
break;

case 16:
alert("Key Pressed: Shift");
break;

case 17:
alert("Key Pressed: Ctrl");
break;

case 18:
alert("Key Pressed: Alt");
break;

case 19:
alert("Key Pressed: Pause");
break;

case 37:
alert("Key Pressed: Arrow Left");
break;

case 38:
alert("Key Pressed: Arrow Up");
break;

case 39:
alert("Key Pressed: Arrow Right");
break;

case 40:
alert("Key Pressed: Arrow Down");
break;
}

}


End script

CheckPressedKey(event)