onchange event is not trigger when drop down size = 1

[Matt]

The following code won't work, because onchange event is not trigger
when drop down size = 1. But if I make the size="2" or greater, then
it will work. Is that true? please advise. thanks!!

<script type="text/javascript">
function showRange()
{ alert("showRange");
}
</script>
<SELECT NAME="range" SIZE="1" onchange="showRange();">
<OPTION VALUE="0">address 1</OPTION>
</SELECT>

 

[McKirahan]

The following code won't work, because onchange event is not trigger
when drop down size = 1. But if I make the size="2" or greater, then
it will work. Is that true? please advise. thanks!!

<script type="text/javascript">
function showRange()
{ alert("showRange");
}
</script>
<SELECT NAME="range" SIZE="1" onchange="showRange();">
<OPTION VALUE="0">address 1</OPTION>
</SELECT>

For "onChange()" to be detected one must move to a different <option>.

Often there is a blank <option> at the head of the list.

 

[Grant Wagner]

The following code won't work, because onchange event is not trigger
when drop down size = 1. But if I make the size="2" or greater, then
it will work. Is that true? please advise. thanks!!

<script type="text/javascript">
function showRange()
{ alert("showRange");
}
</script>
<SELECT NAME="range" SIZE="1" onchange="showRange();">
<OPTION VALUE="0">address 1</OPTION>
</SELECT>

It works fine if you have more than one <option>. If you only have a
single option, there is nothing to "change", so no "onchange" event can
be triggered. The reason it works if have a single <option> and you
specify size="2" is because you now have your defined <option> and an
empty, undefined space for an option. The user can now click that blank
entry, cause a "change" in the item selected which fires the onchange
event.