var xmlHttp

function GetXmlHttpObject() {
    if (typeof XMLHttpRequest != "undefined") {
        return new XMLHttpRequest();
    } else if (window.ActiveXObject) {
      var aVersions = [ "MSXML2.XMLHttp.5.0",
        "MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0",
        "MSXML2.XMLHttp","Microsoft.XMLHttp"
      ];

      for (var i = 0; i < aVersions.length; i++) {
        try {
            var oXmlHttp = new ActiveXObject(aVersions[i]);
            return oXmlHttp;
        } catch (oError) {
            //Do nothing
        }
      }
    }
    throw new Error("XMLHttp object could be created.");
}

function mostra(att,num,ft,ev) {
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }
var url="swapimage.php?";
url=url+"att="+att;
url=url+"&num="+num;
url=url+"&ft="+ft;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=ImgChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function ImgChanged() {
if (xmlHttp.readyState==4)
	{
	eval(xmlHttp.responseText);
	}
}

function illumina(str1,str2,bools){
	var ie='100'
	var moz='1'
	if (bools==0) {
	ie='30'
	moz='0.3'
	}

	document.getElementById(str1).style.MozOpacity=moz;
	document.getElementById(str2).style.MozOpacity=moz;
	
	document.getElementById(str1).filters.alpha.opacity=ie;
	document.getElementById(str2).filters.alpha.opacity=ie;
}