function tech()
{
w=600;
h=500;
window.open("tech.html","_blank", "toolbar=0, location=0, scrollbars=1, resizable=1, directories=0, status=0, menubar=0, width="+w+", height="+h+", top=100, left=200");
}

function showmap()
{
w=400;
h=300;
window.open("map.html","_blank", "toolbar=0, location=0, scrollbars=0, resizable=1, directories=0, status=0, menubar=0, width="+w+", height="+h+", top=100, left=200");
}