function computeForm(form) {

var i = form.interest.value;

    if (i >= 1.0) {

        i = i / 100.0;

        form.interest.value = i;

    }

     i /= 12;


   var prin1 = eval(form.principal.value);

   var prin2 = eval(form.principal.value);

   var pmt1 = form.origPmt.value;

   var pmt2 = eval(form.origPmt.value) + eval(form.pmtAdd.value);

   var prinPort1 = 0;

   var prinPort2 = 0;

   var intPort1 = 0;

   var intPort2 = 0;

   var count1 = 0;

   var count2 = 0;

  var accumInt1 = 0;
  var accumInt2 = 0;
    
   while(prin1 > 0) {
                    intPort1 = eval(i * prin1);
                    accumInt1 = eval(accumInt1) + eval(intPort1);
                    prinPort1 = eval(pmt1 - intPort1);
                    prin1 = eval(prin1 - prinPort1);
                    count1 = count1 + 1
                    if(count1 > 600) { break; } else { continue;}
                    }

   while(prin2 > 0) {
                    intPort2 = eval(i * prin2);
                    accumInt2 = eval(accumInt2) + eval(intPort2);
                    prinPort2 = eval(pmt2 - intPort2);
                    prin2 = eval(prin2 - prinPort2);
                    count2 = count2 + 1
                    if(count2 > 600) { break; } else { continue;}
                    }

      form.intSave.value = eval(accumInt1) - eval(accumInt2);
      form.roi.value = (form.intSave.value / (count2 * form.pmtAdd.value)) / (count2 / 12);

     var timSave = eval(count1) - eval(count2);

      form.results.value = ("If you add $" + form.pmtAdd.value + " to your monthly payment, you will pay off this debt in " + count2 + " payments instead of " + count1 + ", and you will save $" + parseInt(form.intSave.value,10) + " in interest charges.  This savings translates into a guaranteed, tax-free, average annual return of " + parseInt(form.roi.value * 100,10) + "%.  And that's not even considering the emotional returns you'll get when you pay off this debt " + timSave + "-months (" + parseInt(timSave /12,10) + " years, " + (timSave %12) + " months) ahead of schedule!");
}



function clearForm(form)

{

    form.principal.value = "";

    form.interest.value = "";

    form.origPmt.value = "";

    form.pmtAdd.value = "";

    form.intSave.value = "";

    form.roi.value = "";

    form.results.value = "";
}


function validate_contact(form){
	if (form.fname.value==''){
 	 alert('Please enter first name!');
	 return false;
 	}
	if (form.phone.value==''){
 	 alert('Please enter a telephone number!');
	 return false;
 	}
	if (form.email.value==''){
 	 alert('Please enter a valid email address!');
	 return false;
 	}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}