有什么问题请到<a href='/bbs/forums.php?fid=21'>论坛</a>中发表<br> <!-- http://www.ninedns.com/js --> <!-- bbs http://www.ninedns.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.ninedns.com</font></p>
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