JavaScript 弹出输入框 prompt

时间：2010-06-29 来源：humanux

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JavaScript 弹出输入框 prompt</title>
</head>
<script language="javascript" type="text/javascript">
        function addnew()
        {
            var   ret   =   prompt("请输入内容！","");
              if   (ret   ==   null)
              {
                  return false;
              }
              else   if   (ret.replace(/^\s+|\s+$/g,"")   ==   "")
              {
                alert("输入内容为空！");
                 return false;
              }
              document.getElementById("TextBox1").value=ret;
        }
    </script>
<body>
<input type="text" name="TextBox1" id="TextBox1" />
<input type="button" value="add" onclick="addnew()"/>

</body>
</html>

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