I'm really stuck. What I'm trying to do is have a drop down list of courses for a given term. Below the 5 selection lists is 5 default images. When a course is chosen, I'd like the corresponding image to change to show that course's information. I don't want to write a function for each drop down, but have one function to handle all 5 changes.

This is the function that writes the selection list to the page...

function writeFall1() {
document.write('<select name="year1fall"' + year1FallCourses + ' onChange="stuff here>');
document.write('<option>Choose a course...</option>');
//start the filtering of all the CIS courses available for this term
for (i = 0; i < courseList.length; ++i) {
if ( courseList[i].f == "y" ) {
document.write('<option value=' + courseList[i].id + '>' + courseList[i].id + ' </option>');
document.write(courseList[i].id + " " + courseList[i].title);
}
}
document.write('</select> &nbsp; &nbsp; &nbsp; &nbsp;');
//increase this variable so that each selection box corresponds to one image field
year1FallCourses++;

}


This is the attempted image change function, just writing to the site to see what values i'm getting...

function changeImage(courseID, formID) {
document.write(courseID + " " + formID);
document.write(document.year1fall1.options);
}

If it helps, the html for this...
<img name="year1fall1" src="images/default.jpg">
<img name="year1winter1" src="images/default.jpg">
<img name="year1spring1" src="images/default.jpg">
<img name="year2fall1" src="images/default.jpg">
<img name="year2winter1" src="images/default.jpg">
<img name="year2spring1" src="images/default.jpg">

... so those appear horizontally. Going down, its "year1fall2", "year1fall3" etc. to differentiate between the course selections.

It feels like i'm so close! Any help is much appreciated!