imag = new Array();
	    imag[0] = "images/header201.gif";
	    imag[1] = "images/header201off.gif";
	    imag[2] = "images/header203.gif";
	    imag[3] = "images/header203off.gif";
	    imag[4] = "images/header205.gif";
	    imag[5] = "images/header205off.gif";
	    imag[6] = "images/header207.gif";
	    imag[7] = "images/header207off.gif";
	    imag[8] = "images/header211.gif";
	    imag[9] = "images/header211off.gif";
	    imag[10] = "images/header213.gif";
	    imag[11] = "images/header213off.gif";
	    imag[12] = "images/header215.gif";
	    imag[13] = "images/header215off.gif";
	    imag[14] = "images/header217.gif";
	    imag[15] = "images/header217off.gif";
	    imag[16] = "images/header219.gif";
	    imag[17] = "images/header219off.gif";

	    imag[30] = "images/titul-about.gif";
	    imag[31] = "images/titul-database.gif";
	    imag[32] = "images/titul-equipment.gif";
	    imag[33] = "images/titul-monitor.gif";
	    imag[34] = "images/titul-network.gif";
	    imag[35] = "images/titul-papers.gif";
	    imag[36] = "images/titul-research.gif";
	    imag[37] = "images/titul-technologies.gif";
	    imag[38] = "images/titul-waveforms.gif";
	    imag[39] = "images/titul-welcome.gif";


	function swtch(num,imgname){
		imgname.src = im[num].src
	}

	im = new Array()
	for (var i = 0; i < imag.length; i++){
		im[i] = new Image()
		im[i].src = imag[i]
	}