// 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 getChoice(whichSelected) {
var index = 0;
for (i = 0; i < whichSelected.length; i++) {
if (whichSelected[i].checked) {
return i;
}
}
return 0;
}
// Compare form input with correct answer and output response accordingly
function checkAnswer(form, whichQuestion) {
var optionChosen = getChoice(form.entry);
if ((whichQuestion == 1) && (form.entry[optionChosen].value == "Choice 3") ||
(whichQuestion == 2) && (form.entry[optionChosen].value == "Choice 2") ||
(whichQuestion == 3) && (form.entry[optionChosen].value == "Choice 3") ||
(whichQuestion == 4) && (form.entry[optionChosen].value == "Choice 4") ||
(whichQuestion == 5) && (form.entry[optionChosen].value == "Choice 1")) {
form.result.value = "Correct!";
} else {
choice = optionChosen+1;
form.result.value = "Choice " + choice + " is incorrect. Please try again.";
}
}
// Control message in the status bar
function setMsg(msg) {
window.status = msg;
return true;
}
// 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 == "numerical_expression") {
msg = "A" + " numerical expression" + " represents a single value. It consists of ";
msg += "one or more numbers and operations.";
} else {
if (Def == "algebraic_expression") {
msg = "An" + " algebraic expression" + " is a mathematical expression that consists of variables, numbers and operations. ";
msg += "The value of this expression can change.";
}
}
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();
}