function hotcar_over(index){
for(var i=1;i<=3;i++){
document.getElementById("hotcarmenu"+i.toString()).className ='auto_1_2_2';
document.getElementById("hotcarlayer"+i.toString()).style.display = 'none';
}
document.getElementById("hotcarlayer"+index.toString()).style.display = 'block';
document.getElementById("hotcarmenu"+index.toString()).className ='auto_1_2_1';

}