var RAND = 21;
	var CONTROL = 16;
     	var RAND1 = 15;
	var CONTROL1 = 0;
	var DIRECTIONS = "DIRECTIONS: Circle each shape that has a line of symmetry.";
	var t = 0;
 	CORRECT = new Array (4);
	SCREENIMAGE = new Array ("gyshap0.gif","gyshap1.gif","gyshap2.gif","gyshap3.gif","gyshap4.gif","gyshap5.gif","gyshap6.gif","gyshap7.gif","gyshap8.gif","gyshap9.gif","gyshap10.gif","gyshap11.gif","gyshap12.gif","gyshap13.gif","gyshap14.gif","gyshap15.gif","gyshap16.gif","gyshap17.gif","gyshap18.gif","gyshap19.gif","gyshap20.gif","gyshap21.gif","gyshap22.gif","gyshap23.gif","gyshap24.gif","gyshap25.gif","gyshap26.gif","gyshap27.gif","gyshap28.gif","gyshap29.gif","gyshap30.gif","gyshap31.gif","gyshap32.gif","gyshap33.gif","gyshap34.gif","gyshap35.gif","gyshap36.gif","gyshap37.gif","gyshap38.gif","gyshap39.gif");

      	function GetShape() 
	{
		for (i = 0; i < 5; i++)
		{
			NUMBER = Math.random() * RAND1 + CONTROL1;
        		 NUMBER = Math.round (NUMBER);
			NUMBER1 = Math.random() * RAND + CONTROL;
        		 NUMBER1 = Math.round (NUMBER1);
			NUMBER2 = Math.random() * RAND + CONTROL;
        		 NUMBER2 = Math.round (NUMBER2);
			NUMBER3 = Math.random() * RAND + CONTROL;
        		 NUMBER3 = Math.round (NUMBER3);
			if (NUMBER == NUMBER1 || NUMBER == NUMBER2 || NUMBER == NUMBER3 || NUMBER1 == NUMBER2 || NUMBER1 == NUMBER3 || NUMBER2 == NUMBER3)
			{
				i = 1;
			}
			else
			{
				break;
			}
		}
		t++;
		CHOICE = Math.random() * 3;
        	 CHOICE = Math.round (CHOICE);
		switch (t)
		{
			case 1:
				switch (CHOICE)
				{
					case 0:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER3];
					break;
					case 1:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER1];
					break;
					case 2:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER3];
					break;
					case 3:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER];
					break;
				}
				document.images.SHAPE17.src  = SCREENIMAGE[NUMBER];
			break;
			case 2:
				switch (CHOICE)
				{
					case 0:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER3];
					break;
					case 1:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER1];
					break;
					case 2:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER3];
					break;
					case 3:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER];
					break;
				}
				document.images.SHAPE18.src  = SCREENIMAGE[NUMBER];
			break;
			case 3:
				switch (CHOICE)
				{
					case 0:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER3];
					break;
					case 1:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER1];
					break;
					case 2:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER3];
					break;
					case 3:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER];
					break;
				}
				document.images.SHAPE19.src  = SCREENIMAGE[NUMBER];
			break;
			case 4:
				switch (CHOICE)
				{
					case 0:
    						document.images.SHAPE13.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE14.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE15.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE16.src  = SCREENIMAGE[NUMBER3];
					break;
					case 1:
    						document.images.SHAPE13.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE14.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE15.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE16.src  = SCREENIMAGE[NUMBER1];
					break;
					case 2:
    						document.images.SHAPE13.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE14.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE15.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE16.src  = SCREENIMAGE[NUMBER3];
					break;
					case 3:
    						document.images.SHAPE13.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE14.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE15.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE16.src  = SCREENIMAGE[NUMBER];
					break;
				}
				document.images.SHAPE20.src  = SCREENIMAGE[NUMBER];
			break;
		}
      	}