Калькуляторы (Calculators)

Расчет беременности (Pregnancy Calculator)

Описание:

Введите дату последней менструации, и JavaScript рассчитает приблизительную дату рождения вашего будущего ребенка и приблизительный текущий возраст плода. Пригодится всем будущим мамам!

Текст JavaScript-сценария: Calculators: Pregnancy Calculator
Просто выделите текст внутри формы, расположенной внизу, и скопируйте его (нажмите Ctrl-C или Apple-C) в новый текстовый файл программы-редактора (например, NotePad или Simple Text). После этого сохраните его (Ctrl-S или Command-S). Теперь вы можете использовать исходный текст сценария для решения своих задач!!!

  <HEAD> <SCRIPT LANGUAGE="JavaScript">      // Checks for the following valid date formats: // MM/DD/YY MM/DD/YYYY MM-DD-YY MM-DD-YYYY var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/; // requires 4 digit year var matchArray = dateStr.match(datePat); // is the format ok? if (matchArray == null) { alert("Date is not in a valid format.") return false; } month = matchArray[1]; // parse date into variables day = matchArray[3]; year = matchArray[4]; if (month < 1 || month > 12) { // check month range alert("Month must be between 1 and 12."); return false; } if (day < 1 || day > 31) { alert("Day must be between 1 and 31."); return false; } if ((month==4 || month==6 || month==9 || month==11) && day==31) { alert("Month "+month+" doesn't have 31 days!") return false; } if (month == 2) { // check for february 29th var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); if (day>29 || (day==29 && !isleap)) { alert("February " + year + " doesn't have " + day + " days!"); return false; } } return true; } function dispDate(dateObj) { month = dateObj.getMonth()+1; month = (month < 10) ? "0" + month : month; day = dateObj.getDate(); day = (day < 10) ? "0" + day : day; year = dateObj.getYear(); if (year < 2000) year += 1900; return (month + "/" + day + "/" + year); } function pregnancyCalc(pregform) { menstrual = new Date(); // creates new date objects ovulation = new Date(); duedate = new Date(); today = new Date(); cycle = 0, luteal = 0; // sets variables to invalid state ==> 0 if (isValidDate(pregform.menstrual.value)) { // Validates menstual date menstrualinput = new Date(pregform.menstrual.value); menstrual.setTime(menstrualinput.getTime()) } else return false; // otherwise exits cycle = (pregform.cycle.value == "" ? 28 : pregform.cycle.value); // defaults to 28 // validates cycle range, from 22 to 45 if (pregform.cycle.value != "" && (pregform.cycle.value < 22 || pregform.cycle.value > 45)) { alert("Your cycle length is either too short or too long for \n" + "calculations to be very accurate! We will still try to \n" + "complete the calculation with the figure you entered. "); } luteal = (pregform.luteal.value == "" ? 14 : pregform.luteal.value); // defaults to 14 // validates luteal range, from 9 to 16 if (pregform.luteal.value != "" && (pregform.luteal.value < 9 || pregform.luteal.value > 16)) { alert("Your luteal phase length is either too short or too long for \n" + "calculations to be very accurate! We will still try to complete \n" + "the calculation with the figure you entered. "); } // sets ovulation date to menstrual date + cycle days - luteal days // the '*86400000' is necessary because date objects track time // in milliseconds; 86400000 milliseconds equals one day ovulation.setTime(menstrual.getTime() + (cycle*86400000) - (luteal*86400000)); pregform.conception.value = dispDate(ovulation); // sets due date to ovulation date plus 266 days duedate.setTime(ovulation.getTime() + 266*86400000); pregform.duedate.value = dispDate(duedate); // sets fetal age to 14 + 266 (pregnancy time) - time left var fetalage = 14 + 266 - ((duedate - today) / 86400000); weeks = parseInt(fetalage / 7); // sets weeks to whole number of weeks days = Math.floor(fetalage % 7); // sets days to the whole number remainder // fetal age message, automatically includes 's' on week and day if necessary fetalage = weeks + " week" + (weeks > 1 ? "s" : "") + ", " + days + " days"; pregform.fetalage.value = fetalage; return false; // form should never submit, returns false } // End --> </script> </HEAD>  <BODY> <center> <form onSubmit="return pregnancyCalc(this);"> <table> <tr><td> <pre> Last Menstrual Period: <input type=text name=menstrual value="" size=10 maxlength=10> (MM/DD/YYYY format) Average Length of Cycles: <input type=text name=cycle value="" size=3 maxlength=3> (22 to 45) (defaults to 28) Average Luteal Phase Length: <input type=text name=luteal value="" size=3 maxlength=3> (9 to 16) (defaults to 14) <center><input type=submit value="Calculate!"></center> Estimated Conception: <input type=text name=conception value="" size=20> Estimated Due Date: <input type=text name=duedate value="" size=20> Estimated Fetal Age: <input type=text name=fetalage value="" size=20> </pre> </td></tr> </table> </form> </center> <p><center> <font face="arial, helvetica" size="-2">Free JavaScripts provided<br> by <a href="http://javascriptsource.com">The JavaScript Source</a></font> </center><p>

Источник: http://javascriptsource.com