$(function calculateRow() {
    var sum = 0;
    var summa = parseFloat(document.getElementById("w_all").value);
    var res = document.getElementById("result");
    if (document.getElementById("result")){
        $("#mytable th > input#collumn").each(function() {
        var txt = $(this).val(),
              val = parseFloat(txt);
        if (!isNaN(val)) {
            sum += val;
           }
    });
    var razniza = (Math.round(sum*100)/100) - summa;
    if (razniza != 0)
    {
        res.style.color="red";
        res.value = Math.round(sum*100)/100 + " - " + summa +" = "+ Math.round(razniza*100)/100;
    }else{
       res.style.color="green"; 
       res.value = Math.round(sum*100)/100 + " - " + summa +" = "+ razniza; 
    }
}
});