var xmlHttp;
function GetXmlHttpObject(){
	var xmlHttp=null;
	try{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
  	}
	catch (e){
  		// Internet Explorer
  		try{
    		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    	}
  		catch (e){
    		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}

function search_column_1(){
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
  		alert ("Tu browser no soporta AJAX !!");
  		return;
	}
	
	var url;
	
	url="column_1.php?vehicle="+document.getElementById("vehicle").value+"&ie_ajax_fix="+Number(new Date());
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange=function(){
		if (xmlHttp.readyState==4){ 
			document.getElementById("column_1").innerHTML=xmlHttp.responseText;
		}
	};
	xmlHttp.send(null);
	document.getElementById("column_1").innerHTML='<center><img src="../img/loader.gif" /><br /><b>Solicitando la información</b></center>';
	document.getElementById("column_2").style.display="none";
	document.getElementById("column_3").style.display="none";
}

function search_column_2(vehicle, type){
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
  		alert ("Tu browser no soporta AJAX !!");
  		return;
	}
	
	var url;
	
	url="column_2.php?vehicle="+vehicle+"&type="+type+"&ie_ajax_fix="+Number(new Date());
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange=function(){
		if (xmlHttp.readyState==4){ 
			document.getElementById("column_2").innerHTML=xmlHttp.responseText;
		}
	};
	xmlHttp.send(null);
	document.getElementById("column_2").style.display="block";
	document.getElementById("column_2").innerHTML='<center><img src="../img/loader.gif" /><br /><b>Solicitando la información</b></center>';
	document.getElementById("column_3").style.display="none";
}

function search_column_3(description, type){
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
  		alert ("Tu browser no soporta AJAX !!");
  		return;
	}
	
	var url;
	
	url="column_3.php?description="+description+"&type="+type+"&ie_ajax_fix="+Number(new Date());
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange=function(){
		if (xmlHttp.readyState==4){ 
			document.getElementById("column_3").innerHTML=xmlHttp.responseText;
		}
	};
	xmlHttp.send(null);
	document.getElementById("column_3").style.display="block";
	document.getElementById("column_3").innerHTML='<center><img src="../img/loader.gif" /><br /><b>Solicitando la información</b></center>';
}




function div_load(obj, quantity, show){
	// no_desaparecer es opcional (valor predeterminado=0), si es 1, no desaparece un div si se le hace click a él mismo
	if (typeof show == "undefined") {
		show=0;
	}
	// cantdivs es opcional (valor predeterminado=2)
	if (typeof quantity == "undefined") {
		quantity=2;
	}

	if (document.getElementById(obj).style.display=="block" && show==0){
		document.getElementById(obj).style.display="none";
	}else{
		r=obj.match(/[\d\.]+/g);
		minus=r[0].length;
		base=obj.substring(0,obj.length-minus);
		for (i=1; i<=quantity; i++){
			name=base+i;
			div_unload(name);
		}
		document.getElementById(obj).style.display="block";
	}
}

function div_unload(obj){
	document.getElementById(obj).style.display="none";
}




function erase_input(obj){
	document.getElementById(obj).value="";
}




function check_enter(e){
	var keynum;

	if(window.event){		// IE
		keynum=e.keyCode
	}else{					// Netscape/Firefox/Opera
		keynum=e.which
	}

	if (keynum==13){
		search_column_1();
	}
}




function load_intro(){
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
  		alert ("Tu browser no soporta AJAX !!");
  		return;
	}
	
	var url;
	
	url="intro.php?ie_ajax_fix="+Number(new Date());
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange=function(){
		if (xmlHttp.readyState==4){ 
			document.getElementById("intro").innerHTML=xmlHttp.responseText;
		}
	};
	xmlHttp.send(null);
	document.getElementById("intro").style.display="block";
}




function open_radio(){
	window.open('radio.php', 'radio', 'width=410,height=130,menubar=no,status=no,location=no,toolbar=no,scrollbars=no');
}