I am trying to do something that I'm not sure will work.
I want to have arrays created on the fly without having to declare them
each time. In other words, I want to code their declaration automatically.
I have a course with individual themes (each with its own title), and
within each theme there are any number of topics which have a title. I
want to write the theme title followed by the
e.g., using the data below:
(Theme 1, Topic 1)
Community Issues: The way people relate to food
I want to reuse this script, but don't know how many topics will be
associated with each theme.
***************************
Theme = new Array();
Topics = new Array();
// this is the part that I want to do automatically with the function below
/*
Topics[1] = new Array();
Topics[2] = new Array();
Topics[3] = new Array();
Topics[4] = new Array();
Topics[5] = new Array();
*/
// Assign the title to the theme
Theme[1] = "Community Issues";
Theme[2] = "Food-related Problems";
Theme[3] = "Economic Issues";;
Theme[4] = "Health Systems";
Theme[5] = "Policy Applications";
// this sets up the writing of the Theme title
var ThemeTitle;
var i;
function DisplayThemeTitle() {
for (i = 1; i <= Theme.length; i++) {
if (ThemeNum == i) {
ThemeTitle = document.write("<b>" + Theme[i] + ": ");
} // close if 'ThemeNum' statement
} // close for 'Theme' statement
return ThemeTitle;
} // close DisplayThemeTitle function
// this is where I want to create the topics for each theme programatically
var y = 1;
var z;
function CreateTopics(oCourseData) {
// while (y <= Theme.length) {
for (z = 1; z <= Topics.length; z++) {
Topics[ThemeNum] = new Array();
} //end for statement
// } // end while loop
return Topics[z];
} // close function
CreateTopics();
// I then can just declare the title of each topic; the first part of the
array relates to the corresponding theme number
Topics[1][1] = "The way people relate to food";
Topics[1][2] = "The role of 'community' in an optimum food environment";
Topics[1][3] = "Views about responsibility for a healthy population";
Topics[1][4] = "Individual or community oriented programs";
Topics[1][5] = "Political actions in communities for nutrition problems";
Topics[2][1] = ("Protection");
Topics[2][2] = ("Food safety");
Topics[2][3] = ("Food labeling");
Topics[2][4] = ("Policy concepts");
Topics[2][5] = ("Multiple causes of nutrition problems");
Topics[2][6] = ("Causal mode");
// this gets the topic title and [rints it to the document
var x;
var TopicTitle;;
function DisplayTopicTitle() {
for (x = 1; x <= Topics.length; x++) {
if (TopicNum == x) {
TopicTitle = document.write(Topics[ThemeNum][x] + '</b>');
} // close if 'TopicNum' statement
} // close for 'Topic' statement
return TopicTitle;
}
**********************************
I get the error that Topic[1] is undefined. Note that some info comes from
a previous script put in above this one in the html document. I then have
a header.js script right after the <body> tag that calls the two functions
(DisplayThemeTitle() and DisplayTopicTitle)
I tried to do it as an object but was unsuccessful; e.g.,:
oCourseData = new Object(Topics);
Any suggestions?
Regards,
Eric
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