function showBlock(id){
var currentMenu = id.substring(1,2);
var blockNum = currentMenu - 1;
var blockID = "redBlock" + blockNum;
document.getElementById(blockID).style.display="block";
}
function hideBlock(id){
var currentMenu = id.substring(1,2);
var blockNum = currentMenu - 1;
var blockID = "redBlock" + blockNum;
document.getElementById(blockID).style.display="none";
}