<script language="javascript">
function showState()
{
window.status = txt.scrollHeight <= txt.clientHeight? "no scrollbar" : "scrollbar";
}
</script>
<textarea id="txt" rows="3" cols="10" style="overflow:auto" onpropertychange="showState()"></textarea>
function showState()
{
window.status = txt.scrollHeight <= txt.clientHeight? "no scrollbar" : "scrollbar";
}
</script>
<textarea id="txt" rows="3" cols="10" style="overflow:auto" onpropertychange="showState()"></textarea>
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var bHasScrollbar = false;
function showState()
{
var bChanged = false;
if (txt.scrollHeight <= txt.clientHeight)
{
if (bHasScrollbar)
{
bChanged = true;
bHasScrollbar = false;
}
}
else
{
if (!bHasScrollbar)
{
bChanged = true;
bHasScrollbar = true;
}
} if(bChanged)
{
//you can fire events here from your HTC
dvShow.innerText = bHasScrollbar? "Scrollbar appears":"Scrollbar disappears";
}
else
dvShow.innerText = "";}
</script>
<div id="dvShow"></div>
<textarea id="txt" rows="3" cols="10" style="overflow:auto" onpropertychange="showState()"></textarea>
if (propertyName == "value")
{//if txetarea value changed ,exec }