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function DateSelector(form, date, before, after) { |
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this.sDay = form.day || form.elements[0] || null; |
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this.sMonth = form.month || form.elements[1] || null; |
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this.sYear = form.year || form.elements[2] || null; |
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this.yBefore = before || 0; |
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this.yAfter = after || 0; |
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this.BaseDate = date || null; |
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if (!this.BaseDate) { |
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this.BaseDate = new Date(); |
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this.BaseDate = new Date(this.BaseDate.getYear(), |
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this.BaseDate.getMonth() + 1, this.BaseDate.getDate()); |
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} else { |
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this.BaseDate = new Date(this.BaseDate.getYear(), |
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this.BaseDate.getMonth() - 1, this.BaseDate.getDate()); |
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} |
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this.Rebuild = function(d, m, y) { |
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var i, sel; |
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// build day selector |
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if (this.sDay != null) { |
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sel = d || this.sDay.selectedIndex; |
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if (sel < 0) sel = this.BaseDate.getDate() - 1; |
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for (i = 0; i < this.sDay.options.length; i++) |
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this.sDay.options[i] = null; |
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for (i = 0; i < this.nDays; i++) |
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this.sDay.options[i] = new Option(String(i + 1), String(i + 1)); |
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// this.sDay.options.length = this.nDays; |
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this.sDay.selectedIndex = Math.min(sel, this.sDay.options.length - 1); |
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} |
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// build month selector |
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if (this.sMonth != null) { |
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sel = (m - 1) || this.sMonth.selectedIndex; |
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if (sel < 0) sel = this.BaseDate.getMonth(); |
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for (i = 0; i < this.sMonth.options.length; i++) |
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this.sMonth.options[i] = null; |
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for (i = 0; i < 12; i++) { |
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var mon = null; |
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if (this.Months) mon = this.Months[i]; |
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mon = mon || String(i + 1); |
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this.sMonth.options[i] = new Option(mon, String(i + 1)); |
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} |
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// this.sMonth.options.length = 12; |
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this.sMonth.selectedIndex = sel; |
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} |
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// build year selector |
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if (this.sYear != null) { |
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sel = y || this.sYear.selectedIndex; |
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if (sel < 0) sel = this.yBefore; |
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var y = this.BaseDate.getYear(); |
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if (y < 1900) y += 1900; |
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for (i = 0; i < this.sYear.options.length; i++) |
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this.sYear.options[i] = null; |
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var j = 0; |
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for (i = y - this.yBefore; i <= y + this.yAfter; i++) |
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this.sYear.options[j++] = new Option(String(i), String(i)); |
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// this.sYear.options.length = this.yBefore + 1 + this.yAfter; |
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this.sYear.selectedIndex = sel; |
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} |
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} |
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this.Check = function(d, m, y) { |
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var n = new Array(31, -1, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); |
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if (!m) m = (this.sMonth != null && this.sMonth.options.selectedIndex >= 0) ? |
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parseInt(this.sMonth.options[this.sMonth.selectedIndex].value) : this.BaseDate.getMonth(); |
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if (!y) y = (this.sYear != null && this.sYear.options.selectedIndex >= 0) ? |
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parseInt(this.sYear.options[this.sYear.selectedIndex].text) : this.BaseDate.getYear(); |
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if (y < 1900) y += 1900; |
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n[1] = ((y % 4 == 0) && (y % 100 != 0)) ? 29 : 28; |
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this.nDays = n[m - 1]; |
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} |
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this.Reset = function() { |
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var d = this.BaseDate.getDate() - 1; |
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var m = this.BaseDate.getMonth(); |
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var y = this.yBefore; |
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this.Check(d, m, y); |
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this.Rebuild(d, m, y); |
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} |
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this.Today = function() { |
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var t = new Date(); |
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var d = t.getDate() - 1; |
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var m = t.getMonth() + 1; |
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var y = this.yBefore; |
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this.Check(d, m, y); |
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this.Check(d, m, y); |
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this.Rebuild(d, m, y); |
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} |
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this.nDays = null; |
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this.Reset(); |
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return this; |
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} |
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