function BVHelp(form) {
alert("This feature is not yet implemented.");
}
function randomBVProblem(form) {
theF = 1000;
theCR = Math.round((Math.random()*16+4)*10)/10;
theR = Math.round((Math.random()*18+2)*100)/100;
theM = Math.round(Math.random()*29+1);
form.FInput.value="" + theF;
form.CRInput.value="" + theCR;
form.RInput.value="" + theR;
form.MInput.value="" + theM;
form.BOutput.value="";
}
function findBV(form) {
theFStr = form.FInput.value;
if (!isPositiveNumber(theFStr)) {
return false;
}
theCRStr = form.CRInput.value;
if (!isPositiveNumber(theCRStr)) {
return false;
}
theRStr = form.RInput.value;
if (!isPositiveNumber(theRStr)) {
return false;
}
theMStr = form.MInput.value;
if (!isPositiveNumber(theMStr)) {
return false;
}
theF = parseFloat(theFStr);
theCR = parseFloat(theCRStr);
theR = parseFloat(theRStr);
theM = parseInt(theMStr);
var theB = (theCR*theF/200)*((1-Math.pow(1 + theR/200,-2*theM))/(theR/200))+theF/Math.pow(1+theR/200,2*theM);
form.MInput.value = "" + Math.round(theM);
form.BOutput.value = "" + Math.round(theB*100)/100;
return true;
}
function calcBVHelp(form) {
theFStr = form.FInput.value;
if (!isPositiveNumber(theFStr)) {
return false;
}
theCRStr = form.CRInput.value;
if (!isPositiveNumber(theCRStr)) {
return false;
}
theRStr = form.RInput.value;
if (!isPositiveNumber(theRStr)) {
return false;
}
theMStr = form.MInput.value;
if (!isPositiveNumber(theMStr)) {
return false;
}
theF = parseFloat(theFStr);
theCR = parseFloat(theCRStr);
theR = parseFloat(theRStr);
theM = parseInt(theMStr);
var theB = (theCR*theF/200)*((1-Math.pow(1 + theR/200,-2*theM))/(theR/200))+theF/Math.pow(1+theR/200,2*theM);
theB = "" + Math.round(theB*100)/100;
var theOut = "Bond Price Help";
theOut += "Bond Price Help
";
theOut += "To solve using the Texas Instruments BA II Plus Calculator:
";
theOut += "Make sure that the calculator is set up for semiannual compounding before beginning.
";
theOut += "| " + Math.round(theF*100)/100 + " | [FV] |
";
theOut +="| " + Math.round((theCR*theF/200)*100)/100 + " | [PMT] |
";
theOut +="| " + Math.round(theR*100)/100 + " | [I/Y] |
";
theOut +="| " + Math.round(theM*2) + " | [N] |
";
theOut +="| | [CPT][PV] |
";
theOut += "The Bond Price is $" + theB + "
";
theOut += "";
theOut += "";
theOut += "";
var newWin = window.open("","","scrollbars,resizable,width=400,height=420");
if (newWin != null) {
newWin.document.write(theOut);
newWin.document.close();
newWin.focus();
}
return true;
}
function isPositiveNumber(inputStr) {
for (var i = 0; i < inputStr.length; i++) {
var oneChar = inputStr.substring(i,i+1);
if (((oneChar >= "0") && (oneChar <= "9")) || (oneChar == ".")) {
} else {
alert("Please make sure that only numbers are input.");
return false;
}
}
return true;
}
function isNegativeNumber(inputStr) {
if (inputStr.length < 2) {
alert("Please input a negative number.");
return false;
}
var oneChar = inputStr.substring(0,1);
if (oneChar != '-') {
alert("Please make sure that only negative numbers are input.");
return false;
}
for (var i = 1; i < inputStr.length; i++) {
oneChar = inputStr.substring(i,i+1);
if (((oneChar >= "0") && (oneChar <= "9")) || (oneChar == ".")) {
} else {
alert("Please make sure that only numbers are input.");
return false;
}
}
return true;
}