Hi,
I have a listbox set up so users can select multiple choices. I want
to limit them so they can choose no more than 4 at a time. I have set
up javascript code to do the check on the number of choices selected
but what I want to do is if they choose more than 4 (i.e. 5), I want
to unselect the last item they selected. I cannot figure out how to
determine which was the last item selected.
function HasExceededMaxi mumYearWeekCoun t()
{
var count = 0;
for (index = 0; index < fmDetailQuery.l stYearWeek.opti ons.length;
index++)
{
if (document.all.l stYearWeek.opti ons(index).sele cted)
{
count++;
}
}
if (count 4)
{
alert("You can only select a maximum of 4 year weeks at a
time.")
return false;
}
return true;
}
I have tried doing a check on this value:
fmDetailQuery.l stYearWeek.sele ctedIndex
but it always returns me the first item in the listbox that was
selected (i.e. the one at the top of the list that was selected). I
want the last item the user selected, is there a way to determine that? 5 2317
On Aug 8, 2:12 pm, Doogie <dnlwh...@dtgne t.comwrote:
Hi,
I have a listbox set up so users can select multiple choices. I want
to limit them so they can choose no more than 4 at a time. I have set
up javascript code to do the check on the number of choices selected
but what I want to do is if they choose more than 4 (i.e. 5), I want
to unselect the last item they selected. I cannot figure out how to
determine which was the last item selected.
<snap>
You will need onClick event on each checkbox to do that...
On Aug 8, 9:15*am, GArlington <garling...@tis cali.co.ukwrote :
On Aug 8, 2:12 pm, Doogie <dnlwh...@dtgne t.comwrote:Hi,
I have a listbox set up so users can select multiple choices. *I want
to limit them so they can choose no more than 4 at a time. *I have set
up javascript code to do the check on the number of choices selected
but what I want to do is if they choose more than 4 (i.e. 5), I want
to unselect the last item they selected. *I cannot figure out how to
determine which was the last item selected.
<snap>
You will need onClick event on each checkbox to do that...
It's not a checkbox, it's a listbox. I need a way to determine the
last item selected in the list box.
On Aug 8, 3:23 pm, Doogie <dnlwh...@dtgne t.comwrote:
On Aug 8, 9:15 am, GArlington <garling...@tis cali.co.ukwrote :
On Aug 8, 2:12 pm, Doogie <dnlwh...@dtgne t.comwrote:Hi,
I have a listbox set up so users can select multiple choices. I want
to limit them so they can choose no more than 4 at a time. I have set
up javascript code to do the check on the number of choices selected
but what I want to do is if they choose more than 4 (i.e. 5), I want
to unselect the last item they selected. I cannot figure out how to
determine which was the last item selected.
<snap>
You will need onClick event on each checkbox to do that...
It's not a checkbox, it's a listbox. I need a way to determine the
last item selected in the list box.
I have done something like that a long time ago, I think that the
trick was in (still) onClick event, it returned info about which item
was clicked (and therefore selected/deselected)...
Doogie wrote:
On Aug 8, 9:15 am, GArlington <garling...@tis cali.co.ukwrote :
>On Aug 8, 2:12 pm, Doogie <dnlwh...@dtgne t.comwrote:Hi,
>>I have a listbox set up so users can select multiple choices. I want to limit them so they can choose no more than 4 at a time. I have set up javascript code to do the check on the number of choices selected but what I want to do is if they choose more than 4 (i.e. 5), I want to unselect the last item they selected. I cannot figure out how to determine which was the last item selected.
<snap> You will need onClick event on each checkbox to do that...
It's not a checkbox, it's a listbox. I need a way to determine the
last item selected in the list box.
onclick in the select element then. To determine which item(s) is/are
selected, look at the selected property of each option. Simple example:
var i, l, a = [];
for (i = 0, l = selectElement.o ptions.length; i < l; i++) {
if (selectElement. options[i].selected) {
a.push(i);
}
}
window.alert("S elected items were " + a.join(", "));
Set selected to false to unhighlight an option. You might like to
consider check boxes, however; multiple selects can be a pain for the
end user - eg. try using them with just the keyboard.
pr wrote:
onclick
Sorry, should be onchange
>
[code]
ie. by comparing an array denoting previously selected options with the
list of currently selected options, you know which option(s) the user
last selected. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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