// Copyright 2000-2010 Gisele Glosser. All Rights Reserved.
//
// Our interactive math lessons are shareware. You may use our free demo lessons
// on mathgoodies.com only. You may NOT download nor save them. You can purchase
// a license to use all 135 of our lessons off line by visiting:
// http://www.mathgoodies.com/cd/
var msg = "";
var tempWindow;
var newTags;
// Check to see if answer is valid
function checkData(form, whichQuestion) {
var msg;
var noErrors = true;
var testValue = form.entry.value;
if (testValue == "" || testValue == null) {
msg = "Please enter an integer in the ANSWER BOX before clicking ENTER.";
noErrors = false;
} else {
var tempStr = testValue.toString();
for (var index = 0; index < tempStr.length; index++) {
var testOneChar = tempStr.charAt(index);
if ((index == 0 && testOneChar == "-") || (index == 0 && testOneChar == "+")) {
continue;
}
if (testOneChar < "0" || testOneChar > "9") {
msg = "Please enter an integer.";
noErrors = false;
}
}
}
if (noErrors) {
checkAnswer(form, whichQuestion);
} else {
alert(msg);
form.entry.focus();
form.entry.select();
}
}
// Compare form input with correct answer and output response accordingly
function checkAnswer(form, whichQuestion) {
var stringEntered = form.entry.value;
if ((whichQuestion == 1 && stringEntered == "14") ||
(whichQuestion == 1 && stringEntered == "+14") ||
(whichQuestion == 2 && stringEntered == "-2") ||
(whichQuestion == 3 && stringEntered == "122") ||
(whichQuestion == 3 && stringEntered == "+122") ||
(whichQuestion == 4 && stringEntered == "-3") ||
(whichQuestion == 5 && stringEntered == "-30")) {
form.result.value = "Correct!";
} else {
form.result.value = "Incorrect. Please press CLEAR and try again.";
}
form.entry.focus();
form.entry.select();
}
// Control message in the status bar
function setMsg(msg) {
window.status = msg;
return true;
}
// Clear a form
function clearForm(form) {
form.entry.value="";
form.entry.focus();
form.entry.select();
}
// if second window is open, then close it
function closeSecondWindow() {
if (tempWindow && !tempWindow.closed) {
tempWindow.close();
tempWindow = false;
return tempWindow;
}
}
// Determine which definition will be displayed in the second window
function whichDef(Def) {
if (Def == "integers") {
msg = "Integers" + " are whole numbers that describe opposites.";
} else {
if (Def == "fraction_bar") {
msg = "A" + " fraction bar" + " separates the numerator and denominator of a fraction. It indicates ";
msg += "that a division of the numerator by the denominator will be performed. Another name for a fraction bar is a ";
msg += "vinculum.";
}
}
return msg;
}
// This function opens a small window that contains a Math definition.
function popUpWindow(definition) {
passDef = definition;
whichDef(passDef);
// assemble HTML for new window
var newTags = "Definition Window";
newTags += "";
newTags += "Definition
";
newTags += msg + "";
newTags += "
";
newTags += "";
if (!tempWindow || tempWindow.closed) {
tempWindow = window.open ("temp.html","tempWindow", "toolbar=no,width=500,height=180,directories=no,status=no,scrollbars=yes,resize=yes,menubar=no");
if (!tempWindow.opener) {
tempWindow.opener = window;
}
timerDelay(newTags);
} else {
timerDelay(newTags);
}
}
// timer delay
function timerDelay(content) {
getContent = content;
setTimeout("timerDelay",1000);
// write HTML to second window
tempWindow.document.write(getContent);
tempWindow.document.close(); // end of writing to the Temp window
tempWindow.focus();
}