function onMainCatOver() {
	var main = document.cat_selection.mainid;
	main.style.width = '150px';
}
function onMainCatOut() {
	var main = document.cat_selection.mainid;
	main.style.width = '130px';
	var subs = document.cat_selection.subid;
	subs.style.width = '130px';
}
function onSubCatOver() {
	var main = document.cat_selection.subid;
	main.style.width = '370px';
}
function onSubCatChange() {
	var main = document.cat_selection.subid;
	main.style.width = '130px';
}

var categories_list = new Array();
var subcategories_list = new Array();

var firstMainCatChange = true;

function onMainCatChange() {
    var main = document.cat_selection.mainid;
    var subs = document.cat_selection.subid;
    var mid = main.value;
    
    subs.options.length = 0;
    subs.options[0] = new Option('Printer Model Number', 0);
 
    if (subcategories_list[mid]) {
        for (var i=0; i < subcategories_list[mid].length; i++) {
            subs.options[subs.options.length] = new Option(subcategories_list[mid][i][1], subcategories_list[mid][i][0], false, ((firstMainCatChange) && (subcategories_list[mid][i][0] == '" . $sub_id . "')));

			//  REDLIME
            if (cat == subcategories_list[mid][i][0])
            	subs.options[i+1].selected = true
        }
        //subs.style.display = 'block';
    } else {
        //subs.style.display = 'none';
    }
    firstMainCatChange = false;
}