image = new Array(10);
			image[0] = "barimg/mri.gif";
			image[1] = "barimg/paper1.gif";
			image[2] = "barimg/paper2.gif";
			image[3] = "barimg/fused2.gif";
			image[4] = "barimg/fused1.gif";
			image[5] = "barimg/paper3.gif";
			image[6] = "barimg/projection1.gif";
			image[7] = "barimg/projection2.gif";
			image[8] = "barimg/mesh.gif";
			image[9] = "barimg/wire.gif";
			
			image1 = Math.floor(image.length*Math.random());
			do
			{
			  	 image2 = Math.floor(image.length*Math.random());
			}
			while (image2 == image1);
			do
			{
			  	 image3 = Math.floor(image.length*Math.random());
			}
			while ((image3 == image1) || (image3 == image2));
			do
			{
			  	 image4 = Math.floor(image.length*Math.random());
			}
			while ((image4 == image1) || (image4 == image2) || (image4 == image3));
			do
			{
			  	 image5 = Math.floor(image.length*Math.random());
			}
			while ((image5 == image1) || (image5 == image2) || (image5 == image3) || (image5 == image4));
			
			document.getElementById("ri_1").src=image[image1];
			document.getElementById("ri_2").src=image[image2];
			document.getElementById("ri_3").src=image[image3];
			document.getElementById("ri_4").src=image[image4];
			document.getElementById("ri_5").src=image[image5];