AJAXdisplayImg(9);

function AJAXdisplayImg(n) {

var xmlhttp;
if (window.XMLHttpRequest) {
  xmlhttp=new XMLHttpRequest();
}
else if (window.ActiveXObject) {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  } 
xmlhttp.onreadystatechange=function() {
if(xmlhttp.readyState==4) {
  document.getElementById('photoThumbnails').innerHTML =  xmlhttp.responseText;
  }
}

var phpScript = "http://andershoff.net/dbGetImg.php?n=" + n ;
xmlhttp.open("GET",phpScript,true);
xmlhttp.send(null);

}