XTML file results different in IE and fireFox: HTML, XTML, IE and fireFox

XTML file results different in IE and fireFox

I have a "XTML" file with javaScript and graphics that works in fireFox browser but not in IE broswer. Here is it the link:

http://cs330.blueearthconnections.org/My_Coker_Web_files/fractal_online.html

The IE browser simply throws out the source code after pausing a few seconds. I need help finding out and explain the problem.

Thanks

<?xml version = "1.0" encoding = "utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 
<!-- Fig. 9.11: FactorialTest.html -->
<!-- Factorial calculation with a recursive function. -->
<html xmlns = "http://www.w3.org/1999/xhtml">
   <head>
      <title>Recursive Factorial Function</title>
      <script type="text/javascript" src="wz_jsgraphics.js"></script>
 
      <style type  = "text/css">
           div {background-color: #000033}
      </style>
 
   </head>
 
<body>
 
<table>
     <tr> <td>
        <div id="Canvas"  style="position: relative; width: 500px; height:400px; overflow: scroll;"> </div>
          </td>
          
          <td>
                   <form action  = "">
                        <p>  <span style=" color:#00AA00 ">
  
                               x1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y1
                               &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x2 
                               &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y2  <br/>
                        <input id = "x1" type = "text" size="4" />
                        <input id = "y1" type = "text" size="4" />
                         <input id = "x2" type = "text" size="4" />
                         <input id = "y2" type = "text" size="4"/> <br/>
                       beta<br />
                        <input id = "beta" type = "text" />        <br/>
                              angle <br />
                             <input id = "angle" type = "text" />  <br/>
                     
                        level of recursion <br />
                      <input id = "level" type = "text" />
                      <input type = "button" value = "draw tree" 
                         onclick = "fractal_draw()" /><br /> <br/>
                             </span>
                        color <br/>
                       <select id="color"> 
                          <option value="red">red</option>
                          <option value="blue">blue</option>
                           <option value="pink">pink</option>
                          <option value="#123400">random</option>
                          <option value="#00FF00">green</option>
                          <option value="#aabbcc">gray</option>
                           <option value="#BBBBBB">orange</option>
                          <option value="#FFFFFF">white</option>
                       </select>
                         </p>
                    </form>
 
          </td>
     </tr>
 
</table>
 
 <script type = "text/javascript">
      <!--
         var a_div = document.getElementById("Canvas");
         var jg = new jsGraphics(a_div);
             jg.setStroke(3);
       
 
         // calling the function
          jg.setColor("blue");
          fractal(400,300,240,20,0.5,35,4);
          jg.setColor("red");
          fractal(400,300,560,20,0.5,35, 4);
          jg.setColor("orange");
          fractal(400,300,400,600,0.5,35, 4);
          
        
                    
    
 
 
 
         // Recursive definition of fractal tree function
         function fractal(x1, y1, x2, y2, beta, alfa_in, level)                  
         {                                             
           
              // given the above information
              // figuring out the middle point and the branch points
              var xm, ym;
              var xl, yl;
              var xr, yr;
              var alfa;
              
 
              // what am i doing here ?
              alfa = 3.1415926*alfa_in/180.0;
 
 
              xm = x1 + (1-beta)*(x2 - x1);  // review your algebra
              ym = y1 + (1-beta)*(y2 - y1); 
 
              xl = xm + Math.cos(alfa)*(x2 - xm) - Math.sin(alfa)*(y2 - ym);
              yl = ym + Math.sin(alfa)*(x2 - xm) + Math.cos(alfa)*(y2 - ym);
 
              xr = xm + Math.cos(-alfa)*(x2 - xm) - Math.sin(-alfa)*(y2 - ym);
              yr = ym + Math.sin(-alfa)*(x2 - xm) + Math.cos(-alfa)*(y2 - ym);
 
              if(level == 1)
              { 
               // Draw lines
               //document.write("Bottom Point: "+x1+"  "+y1+" to Middle point: "+xm+"  "+ym);
               jg.drawLine(x1,y1,xm,ym);
               //document.write("<br> Middle point: "+xm+"  "+ym+" to top: "+x2+" "+y2);
               jg.drawLine(xm,ym,x2,y2);
               //document.write("<br> Middle point: "+xm+"  "+ym+" to Left point: "+xl+"  "+yl+" ");
                jg.drawLine(xm,ym,xl,yl);
               //document.write("<br> Middle point: "+xm+"  "+ym+" to Right point: "+xr+"  "+yr+" ");
               jg.drawLine(xm,ym,xr,yr);
              }
              else
              {  // recursion, thinking recursively
                    fractal(x1,y1,xm,ym,beta,alfa_in, level-1);
                    fractal(xm,ym,x2,y2,beta,alfa_in, level-1);
                    fractal(xm,ym,xl,yl,beta,alfa_in, level-1);
                    fractal(xm,ym,xr,yr,beta,alfa_in, level-1);           
              }
 
 
 
 
 
         } // end function fractal
 
         // Async draw tiggered from the Form 
           // Recursive definition of fractal tree function
         function fractal_draw()                  
         {    
                var level;
                var levelInput = document.getElementById("level");
                level = levelInput.value;   
 
                 var angleInput = document.getElementById("angle");
                 angle = angleInput.value; 
 
 
                 var betaInput = document.getElementById("beta");
                 beta = betaInput.value; 
                  
                    var xInput = document.getElementById("x1");
                    var x1= parseInt(xInput.value);
 
 
                      var y1Input = document.getElementById("y1");
                      var y1= parseInt(y1Input.value);  
 
                       var x2Input = document.getElementById("x2");
                       var x2= parseInt(x2Input.value);
 
                     var y2Input = document.getElementById("y2");
                      var y2= parseInt(y2Input.value);  
 
                  var colorInput = document.getElementById("color");
                  var selectedColor = colorInput.value; 
 
         
                jg.clear();
                jg.setColor(selectedColor);
                jg.clear();     
                fractal(x1,y1, x2, y2, beta,angle,level);
                jg.paint();
 
         } // fractal_draw
 
 
 
         jg.paint();                                 
        // -->
      </script>
 
</body>
</html>

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XTML file results different in IE and fireFox

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