function dynamicSelect(id1, id2) {
				 if (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));
						 }
				 }
			}