var request = null;
var request1 = null;
var request2 = null;
var reqiest3 = null;

try {
  request = new XMLHttpRequest();
} catch (trymicrosoft) {
  try {
    request = new ActiveXObject("Msxml2.XMLHTTP");
  } catch (othermicrosoft) {
    try {
      request = new ActiveXObject("Microsoft.XMLHTTP");
    } catch (failed) {
      request = null;
    }
  }
}

if (request == null)
  alert("Error creating request object!");
  
try {
  request1 = new XMLHttpRequest();
} catch (trymicrosoft) {
  try {
    request1 = new ActiveXObject("Msxml2.XMLHTTP");
  } catch (othermicrosoft) {
    try {
      request1 = new ActiveXObject("Microsoft.XMLHTTP");
    } catch (failed) {
      request1 = null;
    }
  }
}

if (request1 == null)
  alert("Error creating request object!");

  
try {
  request2 = new XMLHttpRequest();
} catch (trymicrosoft) {
  try {
    request2 = new ActiveXObject("Msxml2.XMLHTTP");
  } catch (othermicrosoft) {
    try {
      request2 = new ActiveXObject("Microsoft.XMLHTTP");
    } catch (failed) {
      request2 = null;
    }
  }
}

if (request2 == null)
  alert("Error creating request object!");

try {
  request3 = new XMLHttpRequest();
} catch (trymicrosoft) {
  try {
    request3 = new ActiveXObject("Msxml2.XMLHTTP");
  } catch (othermicrosoft) {
    try {
      request3 = new ActiveXObject("Microsoft.XMLHTTP");
    } catch (failed) {
      request3 = null;
    }
  }
}

if (request3 == null)
  alert("Error creating request object!");