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<!-- http://www.webjx.com/js -->
<!-- bbs http://www.webjx.com/bbs-->
<!-- 完整的HTML代码 -->
<html>
<head>
<style type="text/css">
.progress{
width: 1px;
height: 14px;
color: white;
font-size: 12px;
overflow: hidden;
background-color: navy;
padding-left: 5px;
}
</style>
<script type="text/JavaScript">
function textCounter(field,counter,maxlimit,linecounter) {
// text width//
var fieldWidth = parseInt(field.offsetWidth);
var charcnt = field.value.length;
// trim the extra text
if (charcnt > maxlimit) {
field.value = field.value.substring(0, maxlimit);
}
else {
// progress bar percentage
var percentage = parseInt(100 - (( maxlimit - charcnt) * 100)/maxlimit) ;
document.getElementById(counter).style.width = parseInt((fieldWidth*percentage)/100)+"px";
document.getElementById(counter).innerHTML="Limit: "+percentage+"%"
// color correction on style from CCFFF -> CC0000
setcolor(document.getElementById(counter),percentage,"background-color");
}
}
function setcolor(obj,percentage,prop){
obj.style[prop] = "rgb(80%,"+(100-percentage)+"%,"+(100-percentage)+"%)";
}
</script>
</head>
<body>
<form>
<textarea rows="5" cols="40" name="maxcharfield" id="maxcharfield"
onKeyDown="textCounter(this,'progressbar1',20)"
onKeyUp="textCounter(this,'progressbar1',20)"
onFocus="textCounter(this,'progressbar1',20)" ></textarea><br />
<div id="progressbar1" class="progress"></div>
<script>textCounter(document.getElementById("maxcharfield"),"progressbar1",20)</script>
</form>
</body>
</html>
<br><br><br>
<p><font color=red>//网站:http://www.webjx.com</font></p>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]