function getParam(paramName){	
	var picture;
	var img1part="<a href='pictures.php'><img title='Click to return to preview page' src='../images1/pics/IMG_";
	var img2part=".JPG'></a>";
	var complete;
	var strHref = window.location.href;
	if ( strHref.indexOf("?") > -1 ){
    		var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
      		if ( strQueryString.indexOf(paramName + "=") > -1 ){
        		var aParam = strQueryString.split("=");
        		picture = aParam[1];
  		}
  	complete=img1part+picture+img2part;
  	}
  	else{
  	complete="An error occured or this picture has been removed.";
  	}
  return complete;
}