function highlightcell(o) {
    o.style.backgroundColor = '#e0eaf5';
    o.style.cursor = 'hand';
}
function normalcellwhite(o) {
    o.style.backgroundColor = '#ffffff';
}
function normalcellgrey(o) {
    o.style.backgroundColor = '#e4e4e4';
}
function normalcelldarkgrey(o) {
    o.style.backgroundColor = '#c4c4c4';
}