📄 ch09_q2.htm

📁 javascript source code part1

💻 HTM

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<HTML>
<HEAD>
<SCRIPT>

var days = new Array();
days[0] = "Sunday";
days[1] = "Monday";
days[2] = "Tuesday";
days[3] = "Wednesday";
days[4] = "Thursday";
days[5] = "Friday";
days[6] = "Saturday";

function dayOfWeek()
{

   var form = document.form1;
   var date = parseInt(form.txtDate.value)
   var year = parseInt(form.txtYear.value)
 
   if (isNaN(date) || isNaN(year))
   {
      alert("Please enter a valid whole number");
   }
   else
   {
      if (date < 1 || date > 31)
      {
         alert("Day of the month must be between 1 and 31");
      }
      else
      {
         userDate = date + " ";
         userDate = userDate + form.selMonth.options[form.selMonth.selectedIndex].value;
         userDate = userDate + " " + year;
         var dateThen = new Date(userDate);
         alert(days[dateThen.getDay()]);
      }
   }
}
</SCRIPT>
</HEAD>
<BODY>

<P>Find the day of your birth</P>
<P>
<FORM name=form1>
<INPUT TYPE=text name=txtDate size=2 maxlength=2>
<SELECT name=selMonth>
   <OPTION selected value="Jan">Jan</OPTION>
   <OPTION selected value="Feb">Feb</OPTION>
   <OPTION selected value="Mar">Mar</OPTION>
   <OPTION selected value="Apr">Apr</OPTION>
   <OPTION selected value="May">May</OPTION>
   <OPTION selected value="Jun">Jun</OPTION>
   <OPTION selected value="Jul">Jul</OPTION>
   <OPTION selected value="Aug">Aug</OPTION>
   <OPTION selected value="Sept">Sept</OPTION>
   <OPTION selected value="Oct">Oct</OPTION>
   <OPTION selected value="Nov">Nov</OPTION>
   <OPTION selected value="Dec">Dec</OPTION>
</SELECT>
<INPUT TYPE=text name=txtYear size=4 maxlength=4>
<BR>
<INPUT type="button" value="Day of the week" 
      onclick="dayOfWeek()" name=button1>
</FORM>
</P>

</BODY>
</HTML>

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