// toggle state dropdownlist when countries are selected
	function toggleState(element) {
		var selectedVal = document.getElementById(element).value;
		if(selectedVal == "AU") {
			document.getElementById("TR_AUSStates").style.display = "";
			document.getElementById("TR_USStates").style.display = "none";
		}
		else if(selectedVal == "US") {
			document.getElementById("TR_AUSStates").style.display = "none";
			document.getElementById("TR_USStates").style.display = "";
		}
		else {
			document.getElementById("TR_AUSStates").style.display = "none";
			document.getElementById("TR_USStates").style.display = "none";
		}
	}
	
	// Toggle fields based on Type of Enquiry selected
	function toggle(element) {
		var selectedVal = document.getElementById(element).value;
		// if General is selected, hide other fields
		if(selectedVal == "General") {
			var general = getElementsByClass("TR_General");
			for(i=0; i<general.length; i++)
				general[i].style.display = "";
				
			var fault = getElementsByClass("TR_Fault");
			for(i=0; i<fault.length; i++)
				fault[i].style.display = "none";
				
			var zonedata = getElementsByClass("TR_ZoneData");
			for(i=0; i<zonedata.length; i++)
				zonedata[i].style.display = "none";
		} // if Fault is selected, hide other fields
		else if(selectedVal == "Fault") {
			var general = getElementsByClass("TR_General");
			for(i=0; i<general.length; i++)
				general[i].style.display = "none";
				
			var fault = getElementsByClass("TR_Fault");
			for(i=0; i<fault.length; i++)
				fault[i].style.display = "";
				
			var zonedata = getElementsByClass("TR_ZoneData");
			for(i=0; i<zonedata.length; i++)
				zonedata[i].style.display = "none";
		} // if Zone Data Error is selected, hide other fields
		else if(selectedVal == "ZoneError") {
			var general = getElementsByClass("TR_General");
			for(i=0; i<general.length; i++)
				general[i].style.display = "none";
				
			var fault = getElementsByClass("TR_Fault");
			for(i=0; i<fault.length; i++)
				fault[i].style.display = "none";
				
			var zonedata = getElementsByClass("TR_ZoneData");
			for(i=0; i<zonedata.length; i++)
				zonedata[i].style.display = "";
		}
		else if(selectedVal == "") {
			var general = getElementsByClass("TR_General");
			for(i=0; i<general.length; i++)
				general[i].style.display = "none";
				
			var fault = getElementsByClass("TR_Fault");
			for(i=0; i<fault.length; i++)
				fault[i].style.display = "none";
				
			var zonedata = getElementsByClass("TR_ZoneData");
			for(i=0; i<zonedata.length; i++)
				zonedata[i].style.display = "none";
		}
	}
	
	// getElementsByClass
	function getElementsByClass( searchClass, domNode, tagName) {
	if (domNode == null) domNode = document;
	if (tagName == null) tagName = '*';
	var el = new Array();
	var tags = domNode.getElementsByTagName(tagName);
	var tcl = " "+searchClass+" ";
	for(i=0,j=0; i<tags.length; i++) {
		var test = " " + tags[i].className + " ";
		if (test.indexOf(tcl) != -1)
			el[j++] = tags[i];
	}
	return el;
}