input只适应内容宽度 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>无标题文档</title> 
<script language="javascript"> 
function checkLength(which) { 
    var maxchar=100; 
    var oTextCount = document.getElementById("char"); 
   iCount = which.value.replace(/[^\u0000-\u00ff]/g,"aa").length; 
    if(iCount<=maxchar) 
    { 
         oTextCount.innerHTML = "<font color=#FF0000>"+ iCount+"</font>"; 
         which.style.border = '1px dotted #FF0000'; 
         which.size=iCount+2; 
    } 
    else alert("请不要超过"+maxchar); 
} 
</script> 
</head> 
<body> 
<input name="words" size="2" maxlength="100" onkeyup="checkLength(this)"/> 
<span id="char">0</span>个字符 
</body> 

</html> 

 

posted @ 2011-12-21 17:03  Mr√liu  阅读(285)  评论(0)    收藏  举报