// JavaScript Document function range(from,to){ var temp=[]; for(var i=from;i<=to;i++){ temp.push(i); } return temp; } function populateMenuFromArray(men,arr,header){ var start=header?+1:+0,a=arr.length; for(var i=start,j=0;j100) msg+="Interest out of range\n"; if(isNaN(yrs.value) || yrs.value<1 || yrs.value >100 || yrs.value%1!=0) msg+="Years out of range"; if(msg){ alert(msg); return false; } } return true; } function getMonthlyPayment(principal,apr,ppy,years){ a=Math.pow(1+apr/100/ppy,ppy*years); return principal*a*(apr/100/ppy)/(a-1); } // Amortization function amortize(prin,yrs,apr){ var m,y,thePrincipal=+(prin),thePayment=getMonthlyPayment(prin,apr,12,yrs),f=document.forms["mort"]; var months=["January","February","March","April","May","June","July","August","September","October","November","December"]; var startDate= ((m=f.months.selectedIndex) && (y=f.years.selectedIndex))?new Date(f.years[y].text,m-1,1):new Date(); startDate.setMonth(startDate.getMonth()-1); var txt='\n\nRepayment Schedule\n'; txt+='\n\n'; txt+='\n
\n\n
\n'; txt+='\n'; txt+='\n\n\n\n\n\n\n'; for(i=1;i<=yrs*12;i++){ startDate.setMonth(startDate.getMonth()+1); var interest=thePrincipal*apr/12/100; thePrincipal+=interest; var principal=thePayment-interest; thePrincipal-=thePayment; txt+='\n\n\n\n\n\n\n\n\n'; } txt+='
PmtDatePayment
Amount		InterestPrincipalBalance
'; txt+=i+''; txt+=months[startDate.getMonth()].substring(0,3)+' '+startDate.getFullYear()+''; txt+=toCurrency(thePayment,"$")+''; txt+=toCurrency(interest,"$")+''; txt+=toCurrency(principal,"$")+''; txt+=toCurrency(thePrincipal,"$")+'
'; txt+='

\n\n
\n\n\n'; var theSchedule=window.open('', '','scrollbars=yes,top=50,left=300,width=450,height=450'); theSchedule.document.write(txt); theSchedule.document.close(); }