IE下javascript的console方法

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FireFox 和 Chrome 下调试JS都有console，IE6下没有。特用此办法来兼容IE6.<br /><pre lang=‘‘html‘‘><!doctype html><html><head><meta charset=‘‘utf-8‘‘/></head><body>112342134<br/>112342134<br/>112342134<br/>112342134<br/>112342134<br/>112342134<br/></body><script>if(!window.console){ console = (function(){ var instance = null; function Constructor(){ this.div = document.createElement(‘‘console‘‘); this.div.id = ‘‘console‘‘; this.div.style.cssText = ‘‘filter:alpha(opacity=80);position:absolute;top:0px;left:0px;width:100%;border:1px solid #ccc;background:#eee;‘‘; document.body.appendChild(this.div); } Constructor.prototype = { log : function(str){ var p = document.createElement(‘‘p‘‘); p.innerHTML = str; this.div.appendChild(p); } } function getInstance(){ if(instance == null){ instance = new Constructor(); } return instance; } return getInstance(); })()}console.log(‘‘444‘‘);console.log(‘‘555‘‘);console.log(‘‘666‘‘);console.log(‘‘777‘‘);</script></html></pre>
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