function viewall() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('img_c_all').style.display = 'block';
document.getElementById('alln').style.display = 'block';
document.getElementById('img_c_ta').style.display = 'none';
document.getElementById('tann').style.display = 'none';
document.getElementById('img_c_in').style.display = 'none';
document.getElementById('intn').style.display = 'none';
document.getElementById('img_c_se').style.display = 'none';
document.getElementById('sern').style.display = 'none';
}
}

function tangible() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('img_c_ta').style.display = 'block';
document.getElementById('tann').style.display = 'block';
document.getElementById('img_c_all').style.display = 'none';
document.getElementById('alln').style.display = 'none';
document.getElementById('img_c_in').style.display = 'none';
document.getElementById('intn').style.display = 'none';
document.getElementById('img_c_se').style.display = 'none';
document.getElementById('sern').style.display = 'none';
}
}

function interfac() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('img_c_in').style.display = 'block';
document.getElementById('intn').style.display = 'block';
document.getElementById('img_c_all').style.display = 'none';
document.getElementById('alln').style.display = 'none';
document.getElementById('img_c_ta').style.display = 'none';
document.getElementById('tann').style.display = 'none';
document.getElementById('img_c_se').style.display = 'none';
document.getElementById('sern').style.display = 'none';
}
}


function services() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('img_c_se').style.display = 'block';
document.getElementById('sern').style.display = 'block';
document.getElementById('img_c_all').style.display = 'none';
document.getElementById('alln').style.display = 'none';
document.getElementById('img_c_in').style.display = 'none';
document.getElementById('intn').style.display = 'none';
document.getElementById('img_c_ta').style.display = 'none';
document.getElementById('tann').style.display = 'none';
}
}

// define image variables and preload

		//1
        var activekids_h = new Image();
        activekids_h.src = "images/t_activekids_h.png";
        var activekids_d = new Image();
        activekids_d.src = "images/t_activekids.png";
		
        var activekids_se_h = new Image();
        activekids_se_h.src = "images/t_activekids_h.png";
        var activekids_se_d = new Image();
        activekids_se_d.src = "images/t_activekids.png";
		
		//2
        var quattro_h = new Image();
        quattro_h.src = "images/t_quattro_h.png";
        var quattro_d = new Image();
        quattro_d.src = "images/t_quattro.png";
		
		var quattro_ta_h = new Image();
        quattro_ta_h.src = "images/t_quattro_h.png";
        var quattro_ta_d = new Image();
        quattro_ta_d.src = "images/t_quattro.png";
		
		//3
        var tilt_h = new Image();
        tilt_h.src = "images/t_tilt_h.png";
        var tilt_d = new Image();
        tilt_d.src = "images/t_tilt.png"
		
		var tilt_ta_h = new Image();
        tilt_ta_h.src = "images/t_tilt_h.png";
        var tilt_ta_d = new Image();
        tilt_ta_d.src = "images/t_tilt.png"
		
		//4
        var water_h = new Image();
        water_h.src = "images/t_water_h.png";
        var water_d = new Image();
        water_d.src = "images/t_water.png";
		
		var water_ta_h = new Image();
        water_ta_h.src = "images/t_water_h.png";
        var water_ta_d = new Image();
        water_ta_d.src = "images/t_water.png";
		
		//5
        var alcatel_h = new Image();
        alcatel_h.src = "images/t_alcatel_h.png";
        var alcatel_d = new Image();
        alcatel_d.src = "images/t_alcatel.png";
		
		var alcatel_in_h = new Image();
        alcatel_in_h.src = "images/t_alcatel_h.png";
        var alcatel_in_d = new Image();
        alcatel_in_d.src = "images/t_alcatel.png";
		
		//6
        var musicmemory_h = new Image();
        musicmemory_h.src = "images/t_musicmemory_h.png";
        var musicmemory_d = new Image();
        musicmemory_d.src = "images/t_musicmemory.png";
		
		var musicmemory_in_h = new Image();
        musicmemory_in_h.src = "images/t_musicmemory_h.png";
        var musicmemory_in_d = new Image();
        musicmemory_in_d.src = "images/t_musicmemory.png";
		
		//7
        var particles_h = new Image();
        particles_h.src = "images/t_particles_h.png";
        var particles_d = new Image();
        particles_d.src = "images/t_particles.png";
	
        var particles_in_h = new Image();
        particles_in_h.src = "images/t_particles_h.png";
        var particles_in_d = new Image();
        particles_in_d.src = "images/t_particles.png";
		
		//8
        var elasticity_h = new Image();
        elasticity_h.src = "images/t_elasticity_h.png";
        var elasticity_d = new Image();
        elasticity_d.src = "images/t_elasticity.png"
		
        var elasticity_in_h = new Image();
        elasticity_in_h.src = "images/t_elasticity_h.png";
        var elasticity_in_d = new Image();
        elasticity_in_d.src = "images/t_elasticity.png"
		
		//9
        var thirtyseconds_h = new Image();
        thirtyseconds_h.src = "images/t_thirtyseconds_h.png";
        var thirtyseconds_d = new Image();
        thirtyseconds_d.src = "images/t_thirtyseconds.png";
		
		//10
        var nundroo_h = new Image();
        nundroo_h.src = "images/t_nundroo_h.png";
        var nundroo_d = new Image();
        nundroo_d.src = "images/t_nundroo.png";

        var nundroo_in_h = new Image();
        nundroo_in_h.src = "images/t_nundroo_h.png";
        var nundroo_in_d = new Image();
        nundroo_in_d.src = "images/t_nundroo.png";
		
		//11
        var dayatwork_h = new Image();
        dayatwork_h.src = "images/t_dayatwork_h.png";
        var dayatwork_d = new Image();
        dayatwork_d.src = "images/t_dayatwork.png";
		
		var dayatwork_se_h = new Image();
        dayatwork_se_h.src = "images/t_dayatwork_h.png";
        var dayatwork_se_d = new Image();
        dayatwork_se_d.src = "images/t_dayatwork.png";
		
		//12
        var bradtuckman_h = new Image();
        bradtuckman_h.src = "images/t_bradtuckman_h.png";
        var bradtuckman_d = new Image();
        bradtuckman_d.src = "images/t_bradtuckman.png";
		
		var bradtuckman_in_h = new Image();
        bradtuckman_in_h.src = "images/t_bradtuckman_h.png";
        var bradtuckman_in_d = new Image();
        bradtuckman_in_d.src = "images/t_bradtuckman.png";
		
		//13
        var navmatrix_h = new Image();
        navmatrix_h.src = "images/t_navmatrix_h.png";
        var navmatrix_d = new Image();
        navmatrix_d.src = "images/t_navmatrix.png";
		
		var navmatrix_in_h = new Image();
        navmatrix_in_h.src = "images/t_navmatrix_h.png";
        var navmatrix_in_d = new Image();
        navmatrix_in_d.src = "images/t_navmatrix.png";
		
// define the rollon() and rolloff() functions
        
        function rollon(xid)
        {
                document[xid].src = eval(xid + "_h.src");
        }
        function rolloff(xid)
        {
                document[xid].src = eval(xid + "_d.src");      
        }