if (document.images) { 
// section on
// test1 
var test1on = new Image();
test1on.src = "http://www.solutionland.com/pic/bt_01_f.gif"; 
var test1off = new Image();
test1off.src = "http://www.solutionland.com/pic/bt_01.gif"; 

// test2
var test2on = new Image();
test2on.src = "http://www.solutionland.com/pic/bt_02_f.gif"; 
var test2off = new Image();
test2off.src = "http://www.solutionland.com/pic/bt_02.gif"; 

// test3 
var test3on = new Image();
test3on.src = "http://www.solutionland.com/pic/bt_03_f.gif";
var test3off = new Image();
test3off.src = "http://www.solutionland.com/pic/bt_03.gif";

// test4 
var test4on = new Image();
test4on.src = "http://www.solutionland.com/pic/bt_04_f.gif";
var test4off = new Image();
test4off.src = "http://www.solutionland.com/pic/bt_04.gif";

// test5 
var test5on = new Image();
test5on.src = "http://www.solutionland.com/pic/bt_05_f.gif";
var test5off = new Image();
test5off.src = "http://www.solutionland.com/pic/bt_05.gif";

// test6 
var test6on = new Image();
test6on.src = "http://www.solutionland.com/pic/bt_06_f.gif";
var test6off = new Image();
test6off.src = "http://www.solutionland.com/pic/bt_06.gif";

// test7 
var test7on = new Image();
test7on.src = "http://www.solutionland.com/pic/bt_07_f.gif";
var test7off = new Image();
test7off.src = "http://www.solutionland.com/pic/bt_07.gif";

// test8 
var test8on = new Image();
test8on.src = "http://www.solutionland.com/pic/bt_08_f.gif";
var test8off = new Image();
test8off.src = "http://www.solutionland.com/pic/bt_08.gif";

// test9 
var test9on = new Image();
test9on.src = "http://www.solutionland.com/pic/bt_eng_f.gif";
var test9off = new Image();
test9off.src = "http://www.solutionland.com/pic/bt_eng.gif";

// test10 
var test10on = new Image();
test10on.src = "http://www.solutionland.com/pic/bt_top_f.gif";
var test10off = new Image();
test10off.src = "http://www.solutionland.com/pic/bt_top.gif";

// test11 
var test11on = new Image();
test11on.src = "http://www.solutionland.com/pic/bt_11_f.gif";
var test11off = new Image();
test11off.src = "http://www.solutionland.com/pic/bt_11.gif";

// section off
} 

// point section
function On(id) { 
if (document.images) { 
document.images[id].src = eval(id + 'on.src'); 
} 
} 

// out section
function Off(id) { 
if (document.images) { 
document.images[id].src = eval(id + 'off.src'); 
} 
}