function sigdig(a)
{
    var dig;
    var declen = a.indexOf(".");
    if(declen == -1){
        dig = 0;
    } else {
        dig = (a.length - (a.indexOf(".") + 1));
    }
    return dig;
}

function roundtosig(sig, num)
{
    var mul = Math.pow(10,sig);
    var res = Math.round(num*mul)/mul;
    return mul;
}