已有字数：4，剩余字数：196

function CountNodeNum(Obj)
{
var Str = Obj.value;
var Len = 0;
if (Str == "")
{
$("NodeInt").innerHTML = "0";
$("NodeCount").innerHTML = "200";
return;
}
Len = Str.length;
if (Len - 200 > 0)
{
$("NodeInt").innerHTML = "200";
$("NodeCount").innerHTML = "0";
Obj.value = Str.substring(0,200);
return;
}
$("NodeInt").innerHTML = Len;
$("NodeCount").innerHTML = 200 - Len;
}


已有字数：<Span ID="NodeInt" style="color:#009900;">0</Span>，剩余字数：<Span ID="NodeCount" style="color:#FF0000;">200</Span>


<textarea name="tbNote" id="tbNote" cols="50" rows="7" title="附加要求" onkeyup="javascript:CountNodeNum(this);"></textarea>