📄 calc.html

📁 this gives details of the network programming

💻 HTML

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<HEAD>
<TITLE>Netprog JavaScript Demos - Calculator</TITLE>
<STYLE>
TD {font-family:sans-serif; font-size:14pt; font-weight: bold}
INPUT {font-family:sans-serif; font-size:14pt; font-weight: bold; color:green}
</STYLE>

<SCRIPT>
function calcpayment() {
   var amt = document.frm.amt.value;
   var ir = document.frm.ir.value / 1200;
   var term = document.frm.term.value * 12;
   var total=1;

   for (i=0;i<term;i++) {
      total = total * (1 + ir);
   }
  mp = amt * ir / ( 1 - (1/total));

  // use Math object to chop all numbers after 2 digits

  document.frm.payment.value = Math.round(mp*100)/100;
  document.frm.total.value = Math.round(mp * term *100)/100 ;
}
</SCRIPT>
</HEAD>

<BODY BGCOLOR=WHITE>
<HTML>

<H2 ALIGN=CENTER>JavaScript Calculator</H2>
<HR>
<CENTER>
<FORM NAME=frm>
<TABLE BGCOLOR=ORCHID CELLSPACING=10>
<TR>
  <TD>Mortgage Amount</TD>
  <TD><INPUT TYPE=TEXT Name=amt></TD>
</TR>

<TR>
  <TD>Yearly Interest Rate</TD>
  <TD><INPUT TYPE=TEXT Name=ir></TD>
</TR>

<TR>
  <TD>Term (in years)</TD>
  <TD><INPUT TYPE=TEXT Name=term></TD>
</TR>
<TR><TD COLSPAN=2><HR></TD></TR>
 <TR>
  <TD>Monthly Payment:</TD>
  <TD><INPUT TYPE=TEXT Name=payment></TD>
</TR>

 <TR>
  <TD>Total Payments:</TD>
  <TD><INPUT TYPE=TEXT Name=total></TD>
</TR>
<TR >
<TD COLSPAN=2 WIDTH=100%>
<INPUT TYPE=BUTTON VALUE="Press to calculate monthly payment"
  onclick="calcpayment();">
</TD></TR>
</TABLE>
</FORM>
</CENTER>

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