var xmlHttp;
var xmlHttp1;

function cambiaCombo(variable,valor,idioma) {
	switch(variable) {
		case "c":
			url = "combo_especialidad.php?ident="+valor;
			xmlHttp1=GetXmlHttpObject(stateChangedSubcategoria);
			break;
		case "p":
			url = "combo_especialidad2.php?ident="+valor;
			xmlHttp1=GetXmlHttpObject(stateChangedSubcategoria2);	
			break;
		case "bc":
			url = "combo_especialidad3.php?idioma="+idioma+"&ident="+valor;
			xmlHttp1=GetXmlHttpObject(stateChangedSubcategoria3);	
			break;
		case "bp":
			url = "combo_especialidad4.php?idioma="+idioma+"&ident="+valor;
			xmlHttp1=GetXmlHttpObject(stateChangedSubcategoria4);	
			break;
	}

	params =  ""; 
	xmlHttp1.open("POST", url, true);
	xmlHttp1.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp1.setRequestHeader("Content-length", params.length);	
	xmlHttp1.send(params);
}

function stateChangedSubcategoria() 
{ 	
	if (xmlHttp1.readyState==4 || xmlHttp1.readyState=="complete")
	{ 
		document.getElementById("cb_especial").innerHTML=xmlHttp1.responseText;
	} 
}
function stateChangedSubcategoria2() 
{ 	
	if (xmlHttp1.readyState==4 || xmlHttp1.readyState=="complete")
	{ 
		document.getElementById("cb_local").innerHTML=xmlHttp1.responseText;
	} 
}
function stateChangedSubcategoria3() 
{ 	
	if (xmlHttp1.readyState==4 || xmlHttp1.readyState=="complete")
	{ 
		document.getElementById("cb_especial_busc").innerHTML=xmlHttp1.responseText;
	} 
}
function stateChangedSubcategoria4() 
{ 	
	if (xmlHttp1.readyState==4 || xmlHttp1.readyState=="complete")
	{ 
		document.getElementById("cp_especial_busc").innerHTML=xmlHttp1.responseText;
	} 
}
function GetXmlHttpObject(handler)
{ 
	var objXmlHttp=null

	if (navigator.userAgent.indexOf("Opera")>=0)
	{
		alert("This 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
	}
}