📄 calc_source.html

📁 this gives details of the network programming

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<HEAD><TITLE>Source for Calculator</TITLE><LINK rel=stylesheet type=text/css HREF=../../style/jsdemo.css></HEAD><BODY BGCOLOR=#CCCCCC MARGINHEIGHT=0 MARGINWIDTH=0 TOPMARGIN=0  LEFTMARGIN=0><TABLE bgColor=#8899aa border=0 cellPadding=4 cellSpacing=0 width=100%>  <TR>    <TD class=title>&nbsp NetProg 2002: Source for Calculator </TD> </TR>  <TR bgColor=black height=10><TD CLASS=menu> </TD></TR></TABLE><DIV CLASS=page><BR><BR><P><CENTER><TABLE BORDER=0 BGCOLOR=#8899aa CELLPADDING=5><TR><TD><TABLE bgcolor=white BORDER=0 CELLPADDING=10><TR><TD><PRE class=codebox>&lt;HEAD>
&lt;TITLE>Netprog JavaScript Demos - Calculator&lt;/TITLE>
&lt;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}
&lt;/STYLE>

&lt;SCRIPT><SPAN CLASS=code>
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&lt;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 ;
}
</SPAN>&lt;/SCRIPT>
&lt;/HEAD>

&lt;BODY BGCOLOR=WHITE>
&lt;HTML>

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

&lt;TR>
  &lt;TD>Yearly Interest Rate&lt;/TD>
  &lt;TD>&lt;INPUT TYPE=TEXT Name=ir>&lt;/TD>
&lt;/TR>

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

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

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