<!-- For javascript form control

// Array Function 

function makeArray() {
var args = makeArray.arguments;

    for (var i = 0; i < args.length; i++) {
    this[i] = args[i];
    }
this.length = args.length;
}

// This array holds the descriptions and names of the pages.

var pages = new makeArray(" -- Jump to --",
"- - - - - - - - - - - - -",
"Introduction",
"Electronic Structure/Filling",
"Relative Radii",
"Ionic Energies",
"Electronegativity",
"Diagonal Relationships",
"Third Row Metals",
"Second Row Oxides",
"Silicates",
"Acidic Nonmetal (P,S,Cl)",
"Oxidation States and Numbers",
"Commen Oxidation States",
"Questions",
"- - - - - - - - - - - - -",
"Another Chapter..?");


// This array hold the URLs of the pages.

var urls = new makeArray("",
"",
"introduction.htm",
"page3.htm",
"page5.htm",
"page8.htm",
"page10.htm",
"page11.htm",
"page13.htm",
"page16.htm",
"page20.htm",
"page26.htm",
"page32.htm",
"page41.htm",
"page42.htm",
"",
"http://www.chem.ox.ac.uk/vrchemistry/foundation.html");






// This function determines which page is selected and goes to it.

function goPage(form) {
i = form.menu.selectedIndex;            
    if (i != 0) {
    window.location.href = urls[i];  
    }
}
//-->