如何用鼠标画出一个矩形框

javascript可以www.38js.com至于在.cs中我也在问，怎样实时画线

解决方案 »

  1.   

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html xmlns:v>
    <head>
        <title>add points to polyline</title>
    </head><style>
    v\:* { behavior: url(#default#VML); }
    body
    {
        margin-left:0px;
        margin-top:0px;
        margin-right:0px;
        margin-bottom:0px;
        font-family:verdana,sans-serif;
        font-size:11px; color:#000000;
    }
    </style><SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript">
    <!--
    //     add points to polyline
    function addPointsToPolyLine()
    {
        //     get mouse position
        var newX = window.event.clientX;
        var newY = window.event.clientY;
        
         //     get object
        var obj = document.getElementById("myPolyLine");    //     get current points
        var tempPoints = obj.points.value
        
         //     update points
        tempPoints += "," + newX + "px," + newY + "px";
        
         //     add points to polyline
        obj.points.value = tempPoints;
    }
    //-->
    </SCRIPT><body onclick="addPointsToPolyLine();"><v:polyline id="myPolyLine" points="0,0,20,20"></v:polyline></body>
    </html>
      

  2.   

    http://www.walterzorn.com/jsgraphics/jsgraphics_e.htmDHTML, JavaScript 
    Draw Line, Circle, Ellipse (Oval), Polyline, Polygon, Rectangle.