function r31(id){
if(id==1){
document.getElementById('r31_1').className="bg01";
document.getElementById('r31_2').className="bg02";
document.getElementById('r31_1c').style.display="block";
document.getElementById('r31_2c').style.display="none";
}
else if(id==2){
document.getElementById('r31_1').className="bg02";
document.getElementById('r31_2').className="bg01";
document.getElementById('r31_1c').style.display="none";
document.getElementById('r31_2c').style.display="block";
}
}


function r32(id){
if(id==1){
document.getElementById('r32_1').className="bg01";
document.getElementById('r32_2').className="bg02";
document.getElementById('r32_1c').style.display="block";
document.getElementById('r32_2c').style.display="none";
}
else if(id==2){
document.getElementById('r32_1').className="bg02";
document.getElementById('r32_2').className="bg01";
document.getElementById('r32_1c').style.display="none";
document.getElementById('r32_2c').style.display="block";
}
}