var xmlHttp

function mostrar(str,pag,obj,img){
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null){
	alert ("Browser does not support HTTP Request")
	return
	} 
	var url=pag+".asp?q="+str+"&pag="+pag+"&obj="+obj+"&img="+img+"&sid="+Math.random()
	xmlHttp.onreadystatechange= function(){ stateChanged(obj); }
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
} 

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

function GetXmlHttpObject(){ 
	var objXMLHttp=null
	if (window.XMLHttpRequest){
		objXMLHttp=new XMLHttpRequest()
	}else if (window.ActiveXObject){
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
}