var ajax=false;

function getAjax(){

	xmlHttp=false;

	try
	{
		// Mozilla
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
	{
		//IE xml2
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(e)
		{
			//IE xml
			try
			{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(e)
			{
				/* We have a problem ! */
				return false;
			}
		}
	}

	return xmlHttp;

}

function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}