function alignHeadersByHeight(table) {
    var maxHeight = 0;
    table.querySelectorAll('h1').forEach(
        element => maxHeight = Math.max(maxHeight, element.clientHeight)
    )
    table.querySelectorAll('h1').forEach(
        element => element.style.height = maxHeight + 'px'
    )
    console.log(maxHeight);
}

var table = document.getElementById("pbic");
alignHeadersByHeight(table);