function getRequestObject()
{
	//create a XMLHttpRequest Object.
	if(window.XMLHttpRequest)
	{ 
		return new XMLHttpRequest();
	}
	else
	{
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
}

//call this function with url of document to open as attribute
function getPubMedCount(containerId,url)
{
	var xmlhttp = getRequestObject();
	if(xmlhttp != null) {
		xmlhttp.open("GET",url,true);
		xmlhttp.onreadystatechange = function() {
						if (xmlhttp.readyState == 1)
						{
							document.getElementById(containerId).innerHTML="...";
						}
						
						if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
						{
							//xmlhttp.responseText is the content of document requested
							document.getElementById(containerId).innerHTML=xmlhttp.responseText;
						}
						else 
						{
								document.getElementById(containerId).innerHTML='-';
						}
		}
		xmlhttp.send(null);
	}
}