var xmlHttp

function toggleCheckBox(src)	{
	var obj = document.getElementById(src);
	//alert(obj.value);	
	//var obj2 = document.getElementById(src + "Img");	
	if (obj.value == "TRUE") {
		obj.value = "FALSE";
		//obj2.className = "selectorFlexImgs"
	} else	{
		obj.value = "TRUE";
		//obj2.className = "selectorFlexImgsSelected"		
	}
	//alert(obj.value);
	filterCables();
}

// Knobs
function filterKnobProducts()	{ 
	var obj1	= document.getElementById('kType');
	var obj2	= document.getElementById('dimensions');
	var obj3	= document.getElementById('shaftSize');
	var obj4	= document.getElementById('colour');
	var url="getKnobOptions.asp?kType=" + obj1.value + "&dimensions=" + obj2.value + "&shaftSize=" + obj3.value + "&colour=" + obj4.value;
	xmlHttp=GetXmlHttpObject(stateChanged)
	xmlHttp.open("GET", url , true)
	xmlHttp.send(null)
}

// Meters
function filterProducts()	{ 
	var obj1	= document.getElementById('zeroPosition');
	var obj2	= document.getElementById('supplyType');
	var obj3	= document.getElementById('signalInput');
	var obj4	= document.getElementById('meterShape');
	var obj25	= document.getElementById('tFilter');	

	var url="getOptions.asp?zeroPosition=" + escape(obj1.value) + "&supplyType=" + escape(obj2.value) + "&signalInput=" + escape(obj3.value) + "&meterShape=" + escape(obj4.value);	
	url = url + "&tFilter=" + obj25.value;
	
	xmlHttp=GetXmlHttpObject(stateChanged)
	xmlHttp.open("GET", url , true)
	xmlHttp.send(null)
}

function stateChanged() { 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")	{ 
		document.getElementById("availableOptions").innerHTML=xmlHttp.responseText
	} 
} 

function GetXmlHttpObject(handler)	{ 
	var objXmlHttp=null

	if (navigator.userAgent.indexOf("Opera")>=0)	{
		alert("This example doesn't work in Opera") 
		return 
	}

	if (navigator.userAgent.indexOf("MSIE")>=0)	{ 
		var strName="Msxml2.XMLHTTP"
		if (navigator.appVersion.indexOf("MSIE 5.5")>=0)	{
			strName="Microsoft.XMLHTTP"
		} 
		try
			{ 
			objXmlHttp=new ActiveXObject(strName)
			objXmlHttp.onreadystatechange=handler 
			return objXmlHttp
			} 
		catch(e)
			{ 
			alert("Error. Scripting for ActiveX might be disabled") 
			return 
			} 
		} 

	if (navigator.userAgent.indexOf("Mozilla")>=0)	{
		objXmlHttp=new XMLHttpRequest()
		objXmlHttp.onload=handler
		objXmlHttp.onerror=handler 
		return objXmlHttp
	}
}