Drop Down Menu With Frames
A drop down menu can be targeted to another frame. For example, suppose that you have a dropdown in the upper frame of a framed page, and you want to target it at the lower frame. We might create this sort of
frameset with the following code. Notice that we
name the lower frame
MAIN:
<FRAMESET ROWS="35%,*">
<FRAME SRC="ddf.titlebar.html" NAME=TITLEBAR>
<FRAME SRC="ddf.lower.html" NAME=MAIN>
<NOFRAMES>NOFRAMES stuff
</NOFRAMES>
</FRAMESET>
To create a drop down menu in the upper frame, we'll use the same script as described in the
previous page. Copy the following script exactly as-is into the
<HEAD> section of your page:
<SCRIPT TYPE="text/javascript">
<!--
function dropdown(mySel)
{
var myWin, myVal;
myVal = mySel.options[mySel.selectedIndex].value;
if(myVal)
{
if(mySel.form.target)myWin = parent[mySel.form.target];
else myWin = window;
if (! myWin) return true;
myWin.location = myVal;
}
return false;
}
//-->
</SCRIPT>The dropdown will use a select form like in the previous example. To target the dropdown at the lower frame we'll make one small change. In the
<FORM ...> tag add a
TARGET attribute targeting the form at the
MAIN frame:
<FORM
ACTION="../cgi-bin/redirect.pl"
METHOD=POST onSubmit="return dropdown(this.gourl)"
TARGET=MAIN
>
<SELECT NAME="gourl">
<OPTION VALUE="">Choose a Destination...
<OPTION VALUE="ddf.lower.html">Home
<OPTION VALUE="ddf.user.html">User Manuals
<OPTION VALUE="ddf.resume.html">Resume
<OPTION VALUE="ddf.contact.html">Contacts
</SELECT>
<INPUT TYPE=SUBMIT VALUE="Go">
</FORM>
This select works almost the same as that in the
previous page. The Javascript checks if the
<FORM ...> has a
TARGET attribute. If it finds one, it redirects the indicated frame instead of the current frame. If the browser has Javascript turned off then it uses the
TARGET attribute anyway when it is redirected by our redirection CGI.
Tidak ada komentar:
Posting Komentar