Implementation Code of Asp.net real-time display of text box words

Copy codeThe Code is as follows:
<Script language = "javascript" type = "text/javascript">
Function countNum ()
{
Var count = document. getElementById ("txtText"). value. length;
Document. getElementById ("lblCount"). value = count;
}
</Script>

Copy codeThe Code is as follows:
<Asp: TextBox ID = "txtText" name = "txtText" runat = "server" Columns = "80" Rows = "8" TextMode = "MultiLine"
Width = "pixel PX" Height = "150px" onkeydown = "countNum ();"
Onmousemove = "countNum ();" onmouseout = "countNum ();" onkeyup = "countNum ();"> </asp: TextBox>
(The word <input id = "lblCount" type = "button" style = "border-style: none; background: none;" value = "0"/> has been entered)

Mouse and keyboard events
Event	Description
OnClick	Click an event.
OnDblClick	Double-click event
OnMouseDown	The button on the mouse is pressed.
OnMouseUp	Events triggered when the mouse is pressed and released
OnMouseOver	Event triggered when you move the cursor over an object range
OnMouseMove	Events triggered when you move the mouse
OnMouseOut	Event triggered when the mouse leaves the range of an object
OnKeyPress	Event triggered when a key on the keyboard is pressed and released. [Note: The page must contain focused objects]
OnKeyDown	Events triggered when a key is pressed on the keyboard [NOTE: The page must contain focused objects]
OnKeyUp	Events triggered when a button on the keyboard is pressed and opened [NOTE: The page must contain focused objects]