function LoadModels(id1, id2) {
	var agt = navigator.userAgent.toLowerCase();
	var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
	var is_mac = (agt.indexOf("mac") != -1);
	if (!(is_ie && is_mac) && document.getElementById && document.getElementsByTagName) {
		var sel1 = document.getElementById(id1);
		var sel2 = document.getElementById(id2);
		var clone = sel2.cloneNode(true);
		var clonedOptions = clone.getElementsByTagName("option");
		refreshDynamicSelectOptions(sel1, sel2, clonedOptions);
		sel1.onchange = function() {
			refreshDynamicSelectOptions(sel1, sel2, clonedOptions);
		};
	}
}
function refreshDynamicSelectOptions(sel1, sel2, clonedOptions) {
	while (sel2.options.length) {
		sel2.remove(0);
	}
	var pattern1 = /( |^)(select)( |$)/;
	var pattern2 = new RegExp("( |^)(" + sel1.options[sel1.selectedIndex].value + ")( |$)");
	for (var i = 0; i < clonedOptions.length; i++) {
		if (clonedOptions[i].className.match(pattern1) || clonedOptions[i].className.match(pattern2)) {
			sel2.appendChild(clonedOptions[i].cloneNode(true));
		}
	}
	var selected_model = document.getElementById("selected_model")
	if (selected_model) {
		setTimeout('selected_model.selected = true', 0);
	}
}