JavaScript

Calculates the day of the week on which you were born.

When were you born? Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

JavaScript Functions:
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function calculate() { month = document.form.month.selectedIndex; month = document.form.month.options[month].value; day = document.form.day.selectedIndex; day = document.form.day.options[day].value; year = document.form.year.value; var dob = month + " " + day + ", " + year; var then = new Date(dob); var theday = then.getDay()+1; var date=then.getDate(); var year=then.getYear(); if (year<100) year="19" + then.getYear(); else year=then.getYear(); var weekday = new Array(6); weekday[1]="Sunday"; weekday[2]="Monday"; weekday[3]="Tuesday"; weekday[4]="Wednesday"; weekday[5]="Thursday"; weekday[6]="Friday"; weekday[7]="Saturday"; if (day != date) alert("Sorry! That appears to be an invalid date!"); else { dayborn = weekday[theday]; dob = dayborn + ", " + month + " " + date + ", " + year + "."; alert("You were born on " + dob); } } // End --> </script>

HTML Script:
<table width=420> <tr> <td align=center> <form name=form> <center> <table border=2 cellspacing=0 cellpadding=0 bgcolor=white> <tr><td colspan=3 align=center><font face="verdana, arial" size="-1">When were you born?</font></td></tr> <tr><td align=center> <select name="month"> <option value="" selected>Month <option value="January">Jan <option value="February">Feb <option value="March">Mar <option value="April">Apr <option value="May">May <option value="June">Jun <option value="July">Jul <option value="August">Aug <option value="September">Sep <option value="October">Oct <option value="November">Nov <option value="December">Dec </select> </td> <td align=center> <select name="day"> <option value="" selected>Day <option value="1">01 <option value="2">02 <option value="3">03 <option value="4">04 <option value="5">05 <option value="6">06 <option value="7">07 <option value="8">08 <option value="9">09 <option value="10">10 <option value="11">11 <option value="12">12 <option value="13">13 <option value="14">14 <option value="15">15 <option value="16">16 <option value="17">17 <option value="18">18 <option value="19">19 <option value="20">20 <option value="21">21 <option value="22">22 <option value="23">23 <option value="24">24 <option value="25">25 <option value="26">26 <option value="27">27 <option value="28">28 <option value="29">29 <option value="30">30 <option value="31">31 </select> </td> <td align=center> <input type=text name=year value="19" size=4 maxlength=4> </td></tr> </table><p> <input type=button value="Calculate" onClick="calculate()"> </center> </form> </td> </tr> </table>

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