js获取回车事件案例1

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
 <head>
  <meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
  <title>回车提交表单</title>
 </head>
 <body>
  <form action="http://www.baidu.com" method="post" name="myForm">
   <input type="text" id="wenben"/>
<select id="select">
<option value="ssss">sssss</option>
   <option value="wwww">wwww</option>
<option value="llll">llll</option>
</select>
   <input type="submit" value="提交" name="tijiao"><font color="#999999">按回车提交表单</font>
  </form>
 </body>
</html>
<script language="JavaScript" type="text/javascript">
  document.onkeydown = function(evt){
     var evt = window.event?window.event:evt;
     if (evt.keyCode==13) {
debugger
var obj = document.getElementById("select"); //定位id
var index = obj.selectedIndex; // 选中索引
var text2 = obj.options[index].text; // 选中文本
var value = obj.options[index].value; // 选中值
alert(index);
alert(text2);
alert(value);
var text=document.getElementById("wenben").value;
alert(text);
            document.forms["myForm"].submit();
     }
   }
</script>