function randomPProblem(form) {
var theS = (Math.round(Math.random()*2200)) + 700;
var theNI = (Math.round(Math.random()*(theS - 1100))) + 100;
var theTA = (Math.round(Math.random()*2000)) + 1000;
var theTE = (Math.round(Math.random()*(theTA - 800))) + 500;
form.SInput.value="" + theS;
form.NIInput.value="" + theNI;
form.TAInput.value="" + theTA;
form.TEInput.value="" + theTE;
form.PMOutput.value="";
form.ROAOutput.value="";
form.ROEOutput.value="";
}
function findP(form) {
var theS = form.SInput.value;
if (!isPositiveNumber(theS)) {
return false;
}
var theNI = form.NIInput.value;
if (!isNumber(theNI)) {
return false;
}
var theTA = form.TAInput.value;
if (!isPositiveNumber(theTA)) {
return false;
}
var theTE = form.TEInput.value;
if (!isPositiveNumber(theTE)) {
return false;
}
var thePM = theNI/theS;
form.PMOutput.value = "" + Math.round(thePM*10000)/100;
var theROA = theNI/theTA;
form.ROAOutput.value = "" + Math.round(theROA*10000)/100;
var theROE = theNI/theTE;
form.ROEOutput.value = "" + Math.round(theROE*10000)/100;
return true;
}
function calcPHelp(form) {
var theS = form.SInput.value;
if (!isPositiveNumber(theS)) {
return false;
}
var theNI = form.NIInput.value;
if (!isNumber(theNI)) {
return false;
}
var theTA = form.TAInput.value;
if (!isPositiveNumber(theTA)) {
return false;
}
var theTE = form.TEInput.value;
if (!isPositiveNumber(theTE)) {
return false;
}
var thePM = theNI/theS;
var theAns = "" + Math.round(thePM*10000)/100;
var theROA = theNI/theTA;
var theAns1 = "" + Math.round(theROA*10000)/100;
var theROE = theNI/theTE;
var theAns2 = "" + Math.round(theROE*10000)/100;
var theStr = "Profitability Ratio Help";
theStr += "Profit Margin Help
";
theStr += "The Profit Margin is calculated as follows:
";
theStr += drawFraction("Profit Margin","Net Income","Sales",theNI,theS,theAns + "\%");
theStr += "Return on Assets Help
";
theStr += "The Return on Assets is calculated as follows:
";
theStr += drawFraction("Return on Assets","Net Income","Total Assets",theNI,theTA,theAns1 + "\%");
theStr += "Return on Equity Help
";
theStr += "The Return on Equity is calculated as follows:
";
theStr += drawFraction("Return on Equity","Net Income","Total Equity",theNI,theTE,theAns2 + "\%");
theStr += "";
theStr += "";
theStr += ""
newWin = window.open("","","scrollbars,resizable,width=400,height=450");
if (newWin != null) {
newWin.document.write(theStr);
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 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;
}
function drawSimpleFraction(inNum,inDen) {
var theOut = "";
theOut += "| " + inNum + " |
";
theOut += "
|
";
theOut += "| " + inDen + " |
";
theOut += "
";
return theOut;
}