var currentMenuHover = null;

function mOver(id) {
    if(currentMenuHover!=null){
        document.getElementById('menuimghover'+currentMenuHover).style.display='none';
        document.getElementById('menuimg'+currentMenuHover).style.display='inline';
    }
    currentMenuHover = id;
    document.getElementById('menuimghover'+currentMenuHover).style.display='inline';
    document.getElementById('menuimg'+currentMenuHover).style.display='none';
}

function mOut() {
    document.getElementById('menuimg'+currentMenuHover).style.display='inline';
    document.getElementById('menuimghover'+currentMenuHover).style.display='none';
    currentMenuHover = null;
}