function drawCalendarPicker()

in server/site/js/source/datepicker.js [585:693]
91 lines of code
12 McCabe index (conditional complexity)

function drawCalendarPicker(obj, date) {
    
    
    obj.focus()
    
    // Default to NOW for calendar.
    var now = new Date()
    
    // if called with an existing date (YYYY-MM-DD),
    // convert it to a JS date object and use that for
    // rendering the calendar
    if (date) {
        var ar = date.split(/-/)
        now = new Date(ar[0],parseInt(ar[1])-1,ar[2])
    }
    var days = ['Mon','Tue','Wed','Thu','Fri','Sat','Sun']
    var mat = now
    
    // Go to first day of the month
    mat.setDate(1)
    
    obj.innerHTML = "<h3>" + months[mat.getMonth()] + ", " + mat.getFullYear() + ":</h3>"
    var tm = mat.getMonth()
    
    // -- Nav buttons --
    
    // back-a-year button
    var a = document.createElement('a')
    fixupPicker(a)
    a.setAttribute("onclick", "drawCalendarPicker(this.parentNode, '" + (mat.getFullYear()-1) + '-' + (mat.getMonth()+1) + '-' + mat.getDate() + "');")
    a.setAttribute("href", "javascript:void(0);")
    a.innerHTML = "≪"
    obj.appendChild(a)
    
    // back-a-month button
    a = document.createElement('a')
    fixupPicker(a)
    a.setAttribute("onclick", "drawCalendarPicker(this.parentNode, '" + mat.getFullYear() + '-' + (mat.getMonth()) + '-' + mat.getDate() + "');")
    a.setAttribute("href", "javascript:void(0);")
    a.innerHTML = "&lt;"
    obj.appendChild(a)
    
    // forward-a-month button
    a = document.createElement('a')
    fixupPicker(a)
    a.setAttribute("onclick", "drawCalendarPicker(this.parentNode, '" + mat.getFullYear() + '-' + (mat.getMonth()+2) + '-' + mat.getDate() + "');")
    a.setAttribute("href", "javascript:void(0);")
    a.innerHTML = "&gt;"
    obj.appendChild(a)
    
    // forward-a-year button
    a = document.createElement('a')
    fixupPicker(a)
    a.setAttribute("onclick", "drawCalendarPicker(this.parentNode, '" + (mat.getFullYear()+1) + '-' + (mat.getMonth()+1) + '-' + mat.getDate() + "');")
    a.setAttribute("href", "javascript:void(0);")
    a.innerHTML = "≫"
    obj.appendChild(a)
    obj.appendChild(document.createElement('br'))
    
    
    // Table containing the dates of the selected month
    var table = document.createElement('table')
    
    table.setAttribute("border", "1")
    table.style.margin = "0 auto"
    
    // Add header day names
    var tr = document.createElement('tr');
    for (var m = 0; m < 7; m++) {
        var td = document.createElement('th')
        td.innerHTML = days[m]
        tr.appendChild(td)
    }
    table.appendChild(tr)
    
    // Until we hit the first day in a month, add blank days
    tr = document.createElement('tr');
    var weekday = mat.getDay()
    if (weekday == 0) {
        weekday = 7
    }
    weekday--;
    for (var i = 0; i < weekday; i++) {
        var td = document.createElement('td')
        tr.appendChild(td)
    }
    
    // While still in this month, add day then increment date by 1 day.
    while (mat.getMonth() == tm) {
        weekday = mat.getDay()
        if (weekday == 0) {
            weekday = 7
        }
        weekday--;
        if (weekday == 0) {
            table.appendChild(tr)
            tr = document.createElement('tr');
        }
        td = document.createElement('td')
        // onclick for setting the calendarPicker's parent to this val.
        td.setAttribute("onclick", "setCalendarDate('" + mat.getFullYear() + '-' + (mat.getMonth()+1) + '-' + mat.getDate() + "');")
        td.innerHTML = mat.getDate()
        mat.setDate(mat.getDate()+1)
        tr.appendChild(td)
    }
    
    table.appendChild(tr)
    obj.appendChild(table)
}