function RollOut(n){
var Left_El=document.getElementById("left"+n);
var Right_El= document.getElementById("right"+n);
var Centr_El = document.getElementById("centr"+n);
Left_El.className = "menl_out";
Right_El.className="menr_out";
Centr_El.className="menc_out"
}
function RollOver(n){
var Left_El=document.getElementById("left"+n);
var Right_El= document.getElementById("right"+n);
var Centr_El = document.getElementById("centr"+n);
Left_El.className = "menl_over";
Right_El.className="menr_over";
Centr_El.className="menc_over"
}