js鼠标，键盘，坐标轴事件

鼠标按下事件，左键是0，滑轮是1，右键2

     document.getElementById("box").onmousedown =function(e)
        {
            if (e.button==0)
            {
                this.style.background="#c00";
            }
            else if(e.button==1)
            {
               this.style.background="#0c0";
            }
            else if(e.button==2)
            {
              this.style.background="#00c";
            }
            else
            {
                alert("你按下了"+e.button+"号键");
            }
             console.log(e.type);
             console.log(e.screenX);
             console.log(e.clientX);
             console.log(e.offsetX);
}

键盘ctrl，alt

        document.onkeydown=function(e)
        {
            if (e.ctrlKey)
            {
                alert("你按下了ctrl键");
            }

             else if (e.altKey)
            {
                alert("你按下了alt键");
            }
            else  if (e.shiftKey)
            {
                alert("你按下了shift键");
            }
             else if (e.ctrlKey &&altKey &&shiftKey)
            {
                alert("你按下了三个键");
            }
             console.log(e.type);
        }

坐标轴时间

var textbox=document.getElementById("textbox");
   var val='';
   document.getElementById("box").onmousedown=function(e)
   {
    e=window.event || e;
    val="e.screenX: "+e.screenX+
       "
e.screenY: "+e.screenY+
        "
clientX: "+e.clientX+    //clientX支持所有浏览器
         "
clientY: "+e.clientY+   //
          "
e.X: "+e.X+
           "
e.Y: "+e.Y+
            "
pageX: "+e.pageX+
             "
pageY: "+e.pageY+
              "
offsetX: "+e.offsetX+
               "
offsetY: "+e.offsetY+
               "
offsetX: "+(e.clientX-this.offsetLeft);
                    textbox.value=val;

                    //offset火狐不支持
                    //可以用此方法
                    //e.clientX-offsetleft           
     }

//html代码

<div id="box"> </div>
<textarea id="textbox" style="display:block;margin:50px auto;400px;height:200px;"></textarea>