function BVHelp(form) {
alert("This feature is not yet implemented.");
}
function randomBVProblem(form) {
var theD = Math.round((Math.random()*6+2)*10)/10;
var theR = Math.round((Math.random()*12+2)*10)/10;
form.DInput.value="" + theD;
form.RInput.value="" + theR;
form.SOutput.value="";
}
function findBV(form) {
var theDStr = form.DInput.value;
if (!isPositiveNumber(theDStr)) {
return false;
}
var theRStr = form.RInput.value;
if (!isPositiveNumber(theRStr)) {
return false;
}
theD = parseFloat(theDStr);
theR = parseFloat(theRStr);
if (theD <= 0) {
alert("The preferred dividend rate must be greater than 0.");
return true;
}
if (theR <= 0) {
alert("The required return must be greater than 0.");
return true;
}
var theS = theD/(theR/100);
form.SOutput.value = "" + Math.round(theS*100)/100;
return true;
}
function calcBVHelp(form) {
var theDStr = form.DInput.value;
if (!isPositiveNumber(theDStr)) {
return false;
}
var theRStr = form.RInput.value;
if (!isPositiveNumber(theRStr)) {
return false;
}
theD = parseFloat(theDStr);
theR = parseFloat(theRStr);
if (theD <= 0) {
alert("The preferred dividend rate must be greater than 0.");
return true;
}
if (theR <= 0) {
alert("The required return must be greater than 0.");
return true;
}
var theS = theD/(theR/100);
theS = "" + Math.round(theS*100)/100;
var theOut = "Preferred Stock Price Help";
theOut += "Preferred Stock Price Help
";
theOut += drawFraction("Pp","Dp","r","" + Math.round(theD*100)/100,"" + Math.round(theR*10)/1000, "$" + theS);
theOut += "";
theOut += "";
theOut += "";
var newWin = window.open("","","scrollbars,resizable,width=400,height=240");
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;
}
function isNumber(inputStr) {
var decFlag = false;
if (inputStr == ".") {
alert("Please make sure that only numbers are input.");
return false;
}
for (var i = 0; i < inputStr.length; i++) {
var oneChar = inputStr.substring(i,i+1);
if ((i == 0) && (inputStr.length > 1)) {
if (((oneChar >= "0") && (oneChar <= "9")) || ((oneChar == ".") && (decFlag == false)) || (oneChar == "-")) {
} else {
alert("Please make sure that only numbers are input.");
return false;
}
} else {
if (((oneChar >= "0") && (oneChar <= "9")) || ((oneChar == ".") && (decFlag == false))) {
} else {
alert("Please make sure that only numbers are input.");
return false;
}
}
if (oneChar == ".") {
decFlag = true;
}
}
return true;
}
function drawFraction(inLHS,inNumFormula,inDenFormula,inNum,inDen,inAnswer) {
var theOut = "";
theOut += "| " + inLHS + " | ";
theOut += "= | ";
theOut += "" + inNumFormula + " | ";
theOut += "= | ";
theOut += "" + inNum + " | ";
theOut += "= | ";
theOut += "" + inAnswer + " | ";
theOut += "
";
theOut += "";
theOut += "
| ";
theOut += "
| ";
theOut += "
";
theOut += "";
theOut += "| " + inDenFormula + " | ";
theOut += "" + inDen + " | ";
theOut += "
";
return theOut;
}