When the text box gets the focus, the background color is changed (you can reference: input, textarea {behavior: URL (/CSS/***. HTC) in the style sheet );})

<! --  
/* ===========================================/
* Behavior file bound to the style textbox

*
* Function:
* When the user's cursor is positioned in an input box,
* The input box displays the dynamic effects of different colors.

========================================== */
-->
< Public: attach event = " Onfocus " Onevent = " Dofocus () "/ >
< Public: attach event = " Onblur " Onevent = " Doblur () "/ >

< Script Language = " JScript " >
Function Dofocus ()
{
If (Element. tagname ! =   ' Input '   && Element. tagname ! =   ' Textarea ' )
Return   False ;
If (Element. tagname =   ' Input '   && (Element. Type =   " Submit "   | Element. Type =   " Button " ))
Return   False ;

If(!Element. readonly)
{
Element. style. backgroundcolor= '# E0ffff';
}
}

Function Doblur ()
{
If (Element. tagname ! =   ' Input '   && Element. tagname ! =   ' Textarea ' )
Return   False ;
If (Element. tagname =   ' Input '   && (Element. Type =   " Submit "   | Element. Type =   " Button " ))
Return   False ;

Element. style. backgroundcolor= '# Ffffff';
}

// Cookie content
Function Getcookieval (offset)
{
VaR Endstr = Document. Cookie. indexof ( " ; " , Offset );
If (Endstr =   - 1 )
Endstr = Document. Cookie. length;
Return Unescape (document. Cookie. substring (offset, endstr ));
}

// Obtains the value of a specified cookie.
Function Getcookie (name)
{
VaR ARG = Name +   " = " ;
VaR Alen = Arg. length;
VaR Clen = Document. Cookie. length;
VaR I =   0 ;
While (I < Clen)
{
VaR J = I + Alen;
If (Document. Cookie. substring (I, j) = Arg)
Return Getcookieval (j );
I = Document. Cookie. indexof ( "   " , I) +   1 ;
If (I =   0 ) Break ;
}
Return   Null ;
}

</SCRIPT>