function draw()   
    {  
      var canvas = document.getElementById('canvas');  
      if (canvas.getContext)  
      {  
        var context = canvas.getContext('2d');  
      
        context.beginPath();  
        context.moveTo(75,75);  
        context.lineTo(10,75);  
        context.lineTo(10,25);  
        context.fill();  
      }  
    }