overview bookmarklet for ProData Hour Reporting page

bookmarklet.js

var contracthours=165,hourrate=123,sum=0,now=new Date,firstday=1,nextday=now.getDate()-(now.getHours()<15?1:0),lastday=(new Date((new Date).setFullYear(now.getFullYear(),now.getMonth()+1,0))).getDate(),workdaysdone=0,workdaysleft=0,msg;for(var d=firstday;d<=lastday;d++){var day=new Date((new Date).setFullYear(now.getFullYear(),now.getMonth(),d)),weekday=day.getDay();if(weekday!==0&&weekday!==6){if(d<=nextday)workdaysdone++;else workdaysleft++}}[].slice.apply(document.querySelectorAll('span[id*="lblTimer"]')).forEach(function(a){sum+=parseFloat(a.innerText)||0});msg=contracthours+" total hours\n"+sum+" hours ("+Math.round(sum/workdaysdone*10)/10+" hours / workday) worked so far.\n"+(contracthours-sum)+" hours ("+Math.round((contracthours-sum)/workdaysleft*10)/10+" hours / workday) to go.\n"+Math.floor(sum*hourrate)+" dkk earned so far";alert(msg)

output.txt

165 total hours
99.5 hours (5.5 hours / workday) worked so far.
65.5 hours (16.4 hours / workday) to go.
12345 dkk earned so far

source.js

var contracthours = 165,
    hourrate = 123,
    sum = 0,
    now = new Date,
    firstday = 1,
    nextday = now.getDate() - (now.getHours() < 15 ? 1 : 0),
    lastday = new Date((new Date).setFullYear(now.getFullYear(), now.getMonth() + 1, 0)).getDate(),
    workdaysdone = 0,
    workdaysleft = 0,
    msg;
for (var d = firstday; d <= lastday; d++) {
    var day = new Date((new Date).setFullYear(now.getFullYear(), now.getMonth(), d)),
        weekday = day.getDay();
    if (weekday !== 0 && weekday !== 6) {
        if (d <= nextday) workdaysdone++;
        else workdaysleft++;
    }
};
[ ].slice.apply(document.querySelectorAll('span[id*="lblTimer"]')).forEach(function (el) {
    sum += (parseFloat(el.innerText) || 0)
});
msg = contracthours + ' total hours\n'
    + sum + ' hours (' + Math.round(sum / workdaysdone * 10) / 10 + ' hours / workday) worked so far.\n'
    + (contracthours - sum) + ' hours (' + Math.round((contracthours - sum) / workdaysleft * 10) / 10 + ' hours / workday) to go.\n'
    + Math.floor(sum * hourrate) + ' dkk earned so far';
alert(msg);