实时统计输入字符数
 <script>
var $E = document.getElementById;
  String.prototype.lenB = function() {
 return this.unHtmlReplace().replace(/\*/g," ").replace(/[^\x00-\xff]/g,"**").length;
 }
String.prototype.unHtmlReplace = function () {
var s = (this).replace(/&/g,"&").replace(/</g,"<").replace(/>/g,">").replace(/ /g," ").replace(/"/g,"\"");
return s.replace(/&#(\d{2});/g,function($0,$1) {return unescape("%"+parseInt($1).toString(16));});
}
function onModChange(s, max, o) { //实时显示输入字数的
if(document.readyState != "complete") {
s = escape(s);
setTimeout('onModChange(unescape("'+ s+ '"),'+ max+ ',$E("'+ o.id+ '"))', 10);
return;
}
var words=s.lenB();
if(words > max)
words = "<font color=red>"+ words+ "</font>";
else
words = "<font color=green>"+ words+ "</font>";
o.innerHTML = "已输入"+ words+ "个字符(最多"+ max+ "个字符)";
}
</script><!--S 发表评论-->
<div>
<label><span>发表评论：</span>
<textarea name="content" id="cmt_content" cols="50" rows="3" onpropertychange="onModChange(this.value, 150, $E('post_status'))"></textarea>
</label>
<div><em id="post_status">已输入<font color=green>0</font>个字符(最多150个字符)</em></div>
</div>
如图所示
| 本文出自 51CTO.COM技术博客 |
实时统计输入字符数
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