function display(obj,id1,id2,id3,id4,id5,id6,id7,id8,id9,id10,id11,id12,id13,id14,id15,id16,id17,id18) {
txt = obj.options[obj.selectedIndex].value;
document.getElementById(id1).style.display = 'none';
document.getElementById(id2).style.display = 'none';
document.getElementById(id3).style.display = 'none';
document.getElementById(id4).style.display = 'none';
document.getElementById(id5).style.display = 'none';
document.getElementById(id6).style.display = 'none';
document.getElementById(id7).style.display = 'none';
document.getElementById(id8).style.display = 'none';
document.getElementById(id9).style.display = 'none';
document.getElementById(id10).style.display = 'none';
document.getElementById(id11).style.display = 'none';
document.getElementById(id12).style.display = 'none';
document.getElementById(id13).style.display = 'none';
document.getElementById(id14).style.display = 'none';
document.getElementById(id15).style.display = 'none';
document.getElementById(id16).style.display = 'none';
document.getElementById(id17).style.display = 'none';
document.getElementById(id18).style.display = 'none';


if ( txt.match(id1) ) {
document.getElementById(id1).style.display = 'block';
window.focus();
}

if ( txt.match(id2) ) {
document.getElementById(id2).style.display = 'block';
window.focus();
}

if ( txt.match(id3) ) {
document.getElementById(id3).style.display = 'block';
window.focus();
}

if ( txt.match(id4) ) {
document.getElementById(id4).style.display = 'block';
window.focus();
}

if ( txt.match(id5) ) {
document.getElementById(id5).style.display = 'block';
window.focus();
}

if ( txt.match(id6) ) {
document.getElementById(id6).style.display = 'block';
window.focus();
}

if ( txt.match(id7) ) {
document.getElementById(id7).style.display = 'block';
window.focus();
}

if ( txt.match(id8) ) {
document.getElementById(id8).style.display = 'block';
window.focus();
}

if ( txt.match(id9) ) {
document.getElementById(id9).style.display = 'block';
window.focus();
}

if ( txt.match(id10) ) {
document.getElementById(id10).style.display = 'block';
window.focus();
}

if ( txt.match(id11) ) {
document.getElementById(id11).style.display = 'block';
window.focus();
}

if ( txt.match(id12) ) {
document.getElementById(id12).style.display = 'block';
window.focus();
}

if ( txt.match(id13) ) {
document.getElementById(id13).style.display = 'block';
window.focus();
}

if ( txt.match(id14) ) {
document.getElementById(id14).style.display = 'block';
window.focus();
}

if ( txt.match(id15) ) {
document.getElementById(id15).style.display = 'block';
window.focus();
}

if ( txt.match(id16) ) {
document.getElementById(id16).style.display = 'block';
window.focus();
}

if ( txt.match(id17) ) {
document.getElementById(id17).style.display = 'block';
window.focus();
}

if ( txt.match(id18) ) {
document.getElementById(id1).style.display = 'block';
document.getElementById(id2).style.display = 'block';
document.getElementById(id3).style.display = 'block';
document.getElementById(id4).style.display = 'block';
document.getElementById(id5).style.display = 'block';
document.getElementById(id6).style.display = 'block';
document.getElementById(id7).style.display = 'block';
document.getElementById(id8).style.display = 'block';
document.getElementById(id9).style.display = 'block';
document.getElementById(id10).style.display = 'block';
document.getElementById(id11).style.display = 'block';
document.getElementById(id12).style.display = 'block';
document.getElementById(id13).style.display = 'block';
document.getElementById(id14).style.display = 'block';
document.getElementById(id15).style.display = 'block';
document.getElementById(id16).style.display = 'block';
document.getElementById(id17).style.display = 'block';
window.focus();
}

}