js错误信息打印到页面函数

            function p(message){
                   var console = document.getElementById('debuginfo');
                   if(console === null){
                           console = document.createElement("div");
                           console.id = "debuginfo";
                           console.style.background = "#dedede";
                           console.style.border = "1px solid silver";
                           console.style.padding = "5px";
                           console.style.width = "400px";
                           console.style.position ="absolute";
                           console.style.right = "0px";
                           console.style.top = "0px";
                           document.body.appendChild(console);
                   }
                   console.innerHTML +="<p>" + message + '</p>';
            }