function pic1(){
    eval("tbx01.style.display='block'");
    eval("tbx02.style.display='none'");
    eval("tbx03.style.display='none'");
	eval("document.getElementById('cygcyg').className='s01'");
}

function pic2(){
    eval("tbx01.style.display='none'");
    eval("tbx02.style.display='block'");
    eval("tbx03.style.display='none'");
    eval("document.getElementById('cygcyg').className='s02'");
}

function pic3(){
    eval("tbx01.style.display='none'");
    eval("tbx02.style.display='none'");
    eval("tbx03.style.display='block'");
    eval("document.getElementById('cygcyg').className='s03'");
}