Loan Calculator Nutt<\/title>\t\t\r\n\t<script type=\"text\/javascript\">\r\n\t\t \/**\r\n * @author Joel Nutt\r\n * ITEC136-V1WW(FA11) - Franklin U.\r\n * David Crossmier - Instructor\r\n * Assigment 8-3 (HW07)\r\n * 11\/06\/2011\r\n * \r\n*\/\r\n\r\nfunction getValues()\r\n{\r\n\t\/\/button click gets values from inputs\r\n\tvar balance = parseFloat(document.getElementById(\"principal\").value);\r\n\tvar interestRate = \r\n\t\tparseFloat(document.getElementById(\"interest\").value\/100.0);\r\n\tvar terms = parseInt(document.getElementById(\"terms\").value);\r\n\t\r\n\t\/\/set the div string\r\n\tvar div = document.getElementById(\"Result\");\r\n\t\r\n\t\/\/in case of a re-calc, clear out the div!\r\n\tdiv.innerHTML = \"\";\r\n\t\r\n\t\/\/validate inputs - display error if invalid, otherwise, display table\r\n\tvar balVal = validateInputs(balance);\r\n\tvar intrVal = validateInputs(interestRate);\r\n\r\n\tif (balVal && intrVal)\r\n\t{\r\n\t\t\/\/Returns div string if inputs are valid\r\n\t\tdiv.innerHTML += amort(balance, interestRate, terms);\r\n\t}\r\n\telse\r\n\t{\r\n\t\t\/\/returns error if inputs are invalid\r\n\t\tdiv.innerHTML += \"Please Check your inputs and retry - invalid values.\";\r\n\t}\r\n}\r\n\r\n\/**\r\n * Amort function:\r\n * Calculates the necessary elements of the loan using the supplied user input\r\n * and then displays each months updated amortization schedule on the page\r\n*\/\r\nfunction amort(balance, interestRate, terms)\r\n{\r\n \/\/Calculate the per month interest rate\r\n\tvar monthlyRate = interestRate\/12;\r\n\t\r\n\t\/\/Calculate the payment\r\n var payment = balance * (monthlyRate\/(1-Math.pow(\r\n 1+monthlyRate, -terms)));\r\n\t \r\n\t\/\/begin building the return string for the display of the amort table\r\n var result = \"Loan amount: RWF\" + balance.toLocaleString('en') + \"<br \/>\" + \r\n \"Interest rate: \" + (interestRate*100).toLocaleString('en') + \"%<br \/>\" +\r\n \"Number of months: \" + terms + \"<br \/>\" +\r\n \"Monthly payment: RWF\" + payment.toLocaleString('en') + \"<br \/>\" +\r\n \"Total paid: RWF\" + (payment * terms).toLocaleString('en') + \"<br \/><br \/>\";\r\n \r\n \/\/add header row for table to return string\r\n\tresult += \"<table border='10'><tr><th>Month #<\/th><th>Balance<\/th>\" + \r\n \"<th>Interest<\/th><th>Principal<\/th>\" ;\r\n \r\n \/**\r\n * Loop that calculates the monthly Loan amortization amounts then adds \r\n * them to the return string \r\n *\/\r\n\tfor (var count = 0; count < terms; ++count)\r\n\t{ \r\n\t\t\/\/in-loop interest amount holder\r\n\t\tvar interest = 0;\r\n\t\t\r\n\t\t\/\/in-loop monthly principal amount holder\r\n\t\tvar monthlyPrincipal = 0;\r\n\t\t\r\n\t\t\/\/start a new table row on each loop iteration\r\n\t\tresult += \"<tr align=center>\";\r\n\t\t\r\n\t\t\/\/display the month number in col 1 using the loop count variable\r\n\t\tresult += \"<td>\" + (count + 1) + \"<\/td>\";\r\n\t\t\r\n\t\t\r\n\t\t\/\/code for displaying in loop balance\r\n\t\tresult += \"<td> RWF \" + balance.toLocaleString('en') + \"<\/td>\";\r\n\t\t\r\n\t\t\/\/calc the in-loop interest amount and display\r\n\t\tinterest = balance * monthlyRate;\r\n\t\tresult += \"<td> RWF \" + interest.toLocaleString('en') + \"<\/td>\";\r\n\t\t\r\n\t\t\/\/calc the in-loop monthly principal and display\r\n\t\tmonthlyPrincipal = payment - interest;\r\n\t\tresult += \"<td> RWF \" + monthlyPrincipal.toLocaleString('en') + \"<\/td>\";\r\n\t\t\/\/end the table row on each iteration of the loop\t\r\n\t\tresult += \"<\/tr>\";\r\n\t\t\r\n\t\t\/\/update the balance for each loop iteration\r\n\t\tbalance = balance - monthlyPrincipal;\t\t\r\n\t}\r\n\t\r\n\t\/\/Final piece added to return string before returning it - closes the table\r\n result += \"<\/table>\";\r\n\t\r\n\t\/\/returns the concatenated string to the page\r\n return result;\r\n}\r\n\r\nfunction validateInputs(value)\r\n{\r\n\t\/\/some code here to validate inputs\r\n\tif ((value == null) || (value == \"\"))\r\n\t{\r\n\t\treturn false;\r\n\t}\r\n\telse\r\n\t{\r\n\t\treturn true;\r\n\t}\r\n}\r\n\t\t \r\n\t\t<\/script>\t\t\r\n\t<\/head>\r\n\t<body>\r\n\t\t<hr>\t\t\r\n\t\t<form>\r\n\t\t\t<fieldset>\r\n\t\t\t\t\r\n\t\t\t\t<label for=\"principal\"><b>Loan Amount:<\/b><\/label>\r\n\t\t\t\t<input type=\"text\" id=\"principal\" \/>\r\n\t\t\t\t<br \/><br \/>\r\n\t\t\t\t<label for=\"interest\"><b>rate per year (%):<\/b><\/label>\r\n\t\t\t\t<select id=\"interest\">\r\n\t\t\t\t\t<option value=\"8\">8 % <\/option>\r\n\t\t\t\t\t<option value=\"9\">9 %<\/option>\r\n\t\t\t\t\t<option value=\"10\">10 %<\/option>\r\n\t\t\t\t\t<option value=\"11\">11 %<\/option>\r\n\t\t\t\t\t<option value=\"12\">12 %<\/option>\r\n <option value=\"13\">13 %<\/option>\r\n \t\t<option value=\"14\">14 % <\/option>\r\n\t\t\t\t\t<option value=\"15\">15 %<\/option>\r\n\t\t\t\t\t<option value=\"16\">16 %<\/option>\r\n\t\t\t\t\t<option value=\"17\">17 %<\/option>\r\n\t\t\t\t\t<option value=\"18\">18 %<\/option>\r\n <option value=\"19\">19 %<\/option>\r\n \t<option value=\"20\">20 %<\/option>\r\n <option value=\"21\">21 %<\/option>\r\n\t\t\t\t<\/select>\r\n\t\t\t\t<label for=\"terms\"><br \/><br \/> <b>Loan term in months:<\/b><\/label>\r\n\t\t\t\t<input type=\"text\" id=\"terms\" \/>\r\n\t\t\t\t<br \/><br \/>\r\n\t\t\t\t<input type=\"button\" value=\"Calculate\" onclick=\"getValues()\" \/>\t\t\t\t\t\t\t\t\r\n\t\t\t<\/fieldset>\r\n\t\t<\/form>\r\n\t\t<form>\r\n\t\t\t<fieldset>\r\n\t\t\t<legend>Outputs<\/legend>\r\n\t\t\t\t<div id=\"Result\"><\/div>\r\n\t\t\t<\/fieldset>\t\t\t\t\t\t\r\n\t\t<\/form>\t\t\r\n\t<\/body>\r\n<\/html>\r\n<script language=\"javascript\"><\/script>\r\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Loan Calculator Nutt Loan Amount: rate per year (%): 8 % 9 %10 %11 %12 %13 %14 % 15 %16 %17 %18 %19 %20 %21 % Loan term in months: Outputs<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-56","page","type-page","status-publish","hentry","post"],"yoast_head":"\n<title>Loan Calculator - 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\n\t\t\t\t\t\t\t\t\t\t $\"\"$ \t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\r\n\r\n\r\n\t\r\n\t\t\r\n\t\tLoan Calculator Nutt<\/title>\t\t\r\n\t<script type=\"text\/javascript\">\r\n\t\t \/**\r\n * @author Joel Nutt\r\n * ITEC136-V1WW(FA11) - Franklin U.\r\n * David Crossmier - Instructor\r\n * Assigment 8-3 (HW07)\r\n * 11\/06\/2011\r\n * \r\n*\/\r\n\r\nfunction getValues()\r\n{\r\n\t\/\/button click gets values from inputs\r\n\tvar balance = parseFloat(document.getElementById(\"principal\").value);\r\n\tvar interestRate = \r\n\t\tparseFloat(document.getElementById(\"interest\").value\/100.0);\r\n\tvar terms = parseInt(document.getElementById(\"terms\").value);\r\n\t\r\n\t\/\/set the div string\r\n\tvar div = document.getElementById(\"Result\");\r\n\t\r\n\t\/\/in case of a re-calc, clear out the div!\r\n\tdiv.innerHTML = \"\";\r\n\t\r\n\t\/\/validate inputs - display error if invalid, otherwise, display table\r\n\tvar balVal = validateInputs(balance);\r\n\tvar intrVal = validateInputs(interestRate);\r\n\r\n\tif (balVal && intrVal)\r\n\t{\r\n\t\t\/\/Returns div string if inputs are valid\r\n\t\tdiv.innerHTML += amort(balance, interestRate, terms);\r\n\t}\r\n\telse\r\n\t{\r\n\t\t\/\/returns error if inputs are invalid\r\n\t\tdiv.innerHTML += \"Please Check your inputs and retry - invalid values.\";\r\n\t}\r\n}\r\n\r\n\/**\r\n * Amort function:\r\n * Calculates the necessary elements of the loan using the supplied user input\r\n * and then displays each months updated amortization schedule on the page\r\n*\/\r\nfunction amort(balance, interestRate, terms)\r\n{\r\n \/\/Calculate the per month interest rate\r\n\tvar monthlyRate = interestRate\/12;\r\n\t\r\n\t\/\/Calculate the payment\r\n var payment = balance * (monthlyRate\/(1-Math.pow(\r\n 1+monthlyRate, -terms)));\r\n\t \r\n\t\/\/begin building the return string for the display of the amort table\r\n var result = \"Loan amount: RWF\" + balance.toLocaleString('en') + \"<br \/>\" + \r\n \"Interest rate: \" + (interestRate*100).toLocaleString('en') + \"%<br \/>\" +\r\n \"Number of months: \" + terms + \"<br \/>\" +\r\n \"Monthly payment: RWF\" + payment.toLocaleString('en') + \"<br \/>\" +\r\n \"Total paid: RWF\" + (payment * terms).toLocaleString('en') + \"<br \/><br \/>\";\r\n \r\n \/\/add header row for table to return string\r\n\tresult += \"<table border='10'><tr><th>Month #<\/th><th>Balance<\/th>\" + \r\n \"<th>Interest<\/th><th>Principal<\/th>\" ;\r\n \r\n \/**\r\n * Loop that calculates the monthly Loan amortization amounts then adds \r\n * them to the return string \r\n *\/\r\n\tfor (var count = 0; count < terms; ++count)\r\n\t{ \r\n\t\t\/\/in-loop interest amount holder\r\n\t\tvar interest = 0;\r\n\t\t\r\n\t\t\/\/in-loop monthly principal amount holder\r\n\t\tvar monthlyPrincipal = 0;\r\n\t\t\r\n\t\t\/\/start a new table row on each loop iteration\r\n\t\tresult += \"<tr align=center>\";\r\n\t\t\r\n\t\t\/\/display the month number in col 1 using the loop count variable\r\n\t\tresult += \"<td>\" + (count + 1) + \"<\/td>\";\r\n\t\t\r\n\t\t\r\n\t\t\/\/code for displaying in loop balance\r\n\t\tresult += \"<td> RWF \" + balance.toLocaleString('en') + \"<\/td>\";\r\n\t\t\r\n\t\t\/\/calc the in-loop interest amount and display\r\n\t\tinterest = balance * monthlyRate;\r\n\t\tresult += \"<td> RWF \" + interest.toLocaleString('en') + \"<\/td>\";\r\n\t\t\r\n\t\t\/\/calc the in-loop monthly principal and display\r\n\t\tmonthlyPrincipal = payment - interest;\r\n\t\tresult += \"<td> RWF \" + monthlyPrincipal.toLocaleString('en') + \"<\/td>\";\r\n\t\t\/\/end the table row on each iteration of the loop\t\r\n\t\tresult += \"<\/tr>\";\r\n\t\t\r\n\t\t\/\/update the balance for each loop iteration\r\n\t\tbalance = balance - monthlyPrincipal;\t\t\r\n\t}\r\n\t\r\n\t\/\/Final piece added to return string before returning it - closes the table\r\n result += \"<\/table>\";\r\n\t\r\n\t\/\/returns the concatenated string to the page\r\n return result;\r\n}\r\n\r\nfunction validateInputs(value)\r\n{\r\n\t\/\/some code here to validate inputs\r\n\tif ((value == null) || (value == \"\"))\r\n\t{\r\n\t\treturn false;\r\n\t}\r\n\telse\r\n\t{\r\n\t\treturn true;\r\n\t}\r\n}\r\n\t\t \r\n\t\t<\/script>\t\t\r\n\t<\/head>\r\n\t<body>\r\n\t\t<hr>\t\t\r\n\t\t<form>\r\n\t\t\t<fieldset>\r\n\t\t\t\t\r\n\t\t\t\t<label for=\"principal\"><b>Loan Amount:<\/b><\/label>\r\n\t\t\t\t<input type=\"text\" id=\"principal\" \/>\r\n\t\t\t\t<br \/><br \/>\r\n\t\t\t\t<label for=\"interest\"><b>rate per year (%):<\/b><\/label>\r\n\t\t\t\t<select id=\"interest\">\r\n\t\t\t\t\t<option value=\"8\">8 % <\/option>\r\n\t\t\t\t\t<option value=\"9\">9 %<\/option>\r\n\t\t\t\t\t<option value=\"10\">10 %<\/option>\r\n\t\t\t\t\t<option value=\"11\">11 %<\/option>\r\n\t\t\t\t\t<option value=\"12\">12 %<\/option>\r\n <option value=\"13\">13 %<\/option>\r\n \t\t<option value=\"14\">14 % <\/option>\r\n\t\t\t\t\t<option value=\"15\">15 %<\/option>\r\n\t\t\t\t\t<option value=\"16\">16 %<\/option>\r\n\t\t\t\t\t<option value=\"17\">17 %<\/option>\r\n\t\t\t\t\t<option value=\"18\">18 %<\/option>\r\n <option value=\"19\">19 %<\/option>\r\n \t<option value=\"20\">20 %<\/option>\r\n <option value=\"21\">21 %<\/option>\r\n\t\t\t\t<\/select>\r\n\t\t\t\t<label for=\"terms\"><br \/><br \/> <b>Loan term in months:<\/b><\/label>\r\n\t\t\t\t<input type=\"text\" id=\"terms\" \/>\r\n\t\t\t\t<br \/><br \/>\r\n\t\t\t\t<input type=\"button\" value=\"Calculate\" onclick=\"getValues()\" \/>\t\t\t\t\t\t\t\t\r\n\t\t\t<\/fieldset>\r\n\t\t<\/form>\r\n\t\t<form>\r\n\t\t\t<fieldset>\r\n\t\t\t<legend>Outputs<\/legend>\r\n\t\t\t\t<div id=\"Result\"><\/div>\r\n\t\t\t<\/fieldset>\t\t\t\t\t\t\r\n\t\t<\/form>\t\t\r\n\t<\/body>\r\n<\/html>\r\n<script language=\"javascript\"><\/script>\r\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Loan Calculator Nutt Loan Amount: rate per year (%): 8 % 9 %10 %11 %12 %13 %14 % 15 %16 %17 %18 %19 %20 %21 % Loan term in months: Outputs<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-56","page","type-page","status-publish","hentry","post"],"yoast_head":"\n<title>Loan Calculator - 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