JavaScript instance: onchange () event for Select

Javascript|select When we use the Select OnChange event, we often encounter the problem that the onchange event is not triggered when the same item is selected consecutively. The onchange event of the Select is this. You have to have change ( Change) in order to trigger the event ....

After mastering its characteristics, the corresponding solution is also very simple.

<select Name=sel >
<option value= "" > Please Select
<option value= "1" >item 1
<option value= "2" >item 2
<option value= "3" >item 3
</select>
<script>
function Bao (s)
{
Txt.value+=s;
When you choose, let the first item be selected so that there is a change.
Document.all.sel.options[0].selected=true;
}
</script>
<textarea id=txt></textarea>