JavaScript instance: onchange () event for Select

Select

When we use the onchange event of Select, we often encounter the problem of not triggering the onchange event when the same item is selected consecutively. The onchange event of the Select is this. You have to have change 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>