function change(which) {
document.getElementById('div0').style.display = 'none';
document.getElementById('div1').style.display = 'none';
document.getElementById('div2').style.display = 'none';
document.getElementById('div3').style.display = 'none';
document.getElementById('div4').style.display = 'none';
document.getElementById(which).style.display = 'block';
switch (which) {
case 'div0':
document.getElementById('div0click').className = 'contenthm0-on';
document.getElementById('div1click').className = 'contenthm1';
document.getElementById('div2click').className = 'contenthm2';
document.getElementById('div3click').className = 'contenthm3';
//document.getElementById('div4click').className = 'contenthm4';
break;
case 'div1':
document.getElementById('div0click').className = 'contenthm0';
document.getElementById('div1click').className = 'contenthm1-on';
document.getElementById('div2click').className = 'contenthm2';
document.getElementById('div3click').className = 'contenthm3';
//document.getElementById('div4click').className = 'contenthm4';
break;
case 'div2':
document.getElementById('div0click').className = 'contenthm0';
document.getElementById('div1click').className = 'contenthm1';
document.getElementById('div2click').className = 'contenthm2-on';
document.getElementById('div3click').className = 'contenthm3';
//document.getElementById('div4click').className = 'contenthm4';
break;
case 'div3':
document.getElementById('div0click').className = 'contenthm0';
document.getElementById('div1click').className = 'contenthm1';
document.getElementById('div2click').className = 'contenthm2';
document.getElementById('div3click').className = 'contenthm3-on';
//document.getElementById('div4click').className = 'contenthm4';
break;
case 'div4':
document.getElementById('div0click').className = 'contenthm0';
document.getElementById('div1click').className = 'contenthm1';
document.getElementById('div2click').className = 'contenthm2';
document.getElementById('div3click').className = 'contenthm3';
//document.getElementById('div4click').className = 'contenthm4-on';
break;
}
}