$(document).ready(function() {

	$("#manufacturers").change(function () {
		var services = document.getElementById("services");
		var selectedManu = this.options[this.options.selectedIndex].value;
		
		for (m=services.options.length-1;m>0;m--) services.options[m]=null;
		for (i=0;i<group[selectedManu].length;i++) services.options[i]=new Option(group[selectedManu][i].text,group[selectedManu][i].value);
	});
	
});