[Javascript] Select all when a chekcbox is checked

[Reuben D Budiardja]

This is great. Thanks a lot Peter.

Reuben D. Budiardja


At 03:00 PM 4/28/01 -0500, you wrote:
>Reuben,
>
>         You would need an onClick() event handler in the checkbox that 
> calls a
>JavaScript function, like this:
>
><INPUT TYPE = "CHECKBOX" NAME="all"  onClick="selectAll()">
>
>         Then in the function you would iterate through the values in the 
> SELECT
>element and change the selected property to true, like this:
>
>function selectAll() {
>
>         var i = 0;
>
>         while(i<document.formName.selectName.options.length) {
>                 document.formName.selectName.options[i].selected = true;
>                 i+=1;
>                 }
>         }
>
>         I haven't tested this; it may be that you need to stop at 
> length-1, but you
>can tweak it as necessary.
>
>Cheers,
>
>Peter
>
>
>|-----Original Message-----
>|From: javascript-admin at LaTech.edu [mailto:javascript-admin at LaTech.edu]On
>|Behalf Of Reuben D Budiardja
>|Sent: Saturday, April 28, 2001 2:34 PM
>|To: javascript at LaTech.edu
>|Subject: [Javascript] Select all when a chekcbox is checked
>|
>|
>|
>|Hello,
>|Suppose I have a multiple selection form, something like this:
>|
>|<SELECT NAME="assignments" MULTIPLE SIZE="9">
>|   <OPTION NAME=bla>Bla
>|   <OPTION NAME=foo>foo
>|etc..
>|</SELECT>
>|
>|<INPUT TYPE = "CHECKBOX" NAME="all> Select All
>|
>|What  I want to do is when the checkbox is checked, all the selection is
>|selected. Could someone help me with this?
>|
>|Thanks A lot.
>|Reuben D. Budiardja
>|
>|
>|
>|
>|Reuben D. Budiardja
>|Web Database Application Programmer / Analyst
>|Devcorps, ITS
>|Goshen College, IN 46526
>|
>|
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>|
>
>
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Reuben Donald Budiardja
reubendb at goshen.edu
Homepage: http://www.goshen.edu/~reubendb