// JavaScript Document
var ots = document.getElementById("ot-village").getElementsByTagName("div");
var sel = document.getElementById("tx_deccontact_pi1-structure");

showRightOt = function () {
	var val = sel.nodeName == "select" ? sel[sel.selectedIndex].value : sel.value;
	for(var i = 0; i < ots.length; i++) {
		if(ots[i].className.indexOf("structure") != -1) {
			ots[i].style.display = ots[i].className.indexOf("structure"+val) == -1 ? "none" : "block";	
		}
	}
}

showRightOt();
sel.onchange = showRightOt;