function debug(msg){ 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <title> debug_msg </title>
  <meta charset="UTF-8">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
 </head>

 <body>
<script type="text/javascript">
function debug(msg){
    var log=document.getElementById("debuglog");
    if(!log){
        log=document.createElement("div");
        log.id="debuglog";
        log.innerHTML="<h1>Debug Log</h1>";
        document.body.appendChild(log);
    }
    //
    var pre=document.createElement("pre");
    var text=document.createTextNode(msg);
    pre.appendChild(text);
    log.appendChild(pre);
}

function addlog(msg){
    debug(msg);
}
</script>

<input type="button" value="addlog" onclick="addlog(this.value)">
 </body>
</html>

 

 <body>
<script type="text/javascript">
function debug(msg){
    var log=document.getElementById("debugInfo");
    if(!log){
        log=document.createElement("div");
        log.id="debugInfo";
        document.body.appendChild(log);
    }

    //var msg_text=document.createTextNode(msg);
    var preNode=document.createElement("pre");
    //preNode.appendChild(msg_text);
    preNode.innerHTML=msg;

    log.appendChild(preNode);
}
</script>

<input type="button" value="asdfg" onclick="debug(this.value)">
 </body>

 

posted @ 2017-12-27 10:53  sky20080101  阅读(170)  评论(0)    收藏  举报