查看下面的同学代码啊！！！！！！！！

 function setReset() 
        { 
        var sr = document.getElementById("txt");
        var srs = confirm("确认取消设置?");
        if (srs==true)
        {
            sr.style.color = "black";
            sr.style.backgroundColor = "white";
            sr.style.width = orignWidth;
            sr.style.height = orignHeight;
            sr.style.display = "block";
        }
     }

或者

 offSet:function(){
        var message=confirm("你确定要重置所有设置么？");
        if(message==true){
            txt.removeAttribute('style');
        }
    }