文本框随文本的长度而增长
<!Doctype HTML PUBLIC "-//W3c//DTD Html 1.0 Transitional//EN"> <html> <head> <title>文本框随文本的宽度而增长</title> </head> <script type="text/javascript"> function changeInputlength(cursor) { var getcount=document.getElementById("countFont"); var getText=document.getElementById("text"); getcount.innerHTML='<font>第'+(parseInt(getText.value.length)+1)+'个字符</font>'; cursor.size=getText.value.length+2; } </script> <body> <input type="text" size="3" id="text" onkeydown="changeInputlength(this);"/> <span id="countFont"></span> </body> </html>