img1=new Image(); img1.src="graph/leftmary/50.gif";
  img2=new Image(); img2.src="graph/leftmary/284.gif";
  img3=new Image(); img3.src="graph/leftmary/285.gif";
  img4=new Image(); img4.src="graph/leftmary/294.gif";
  img5=new Image(); img5.src="graph/leftmary/296.gif";
  img6=new Image(); img6.src="graph/leftmary/297.gif";