var xmlHttp = false;
var lastact = null;
function sndReq(action)
{
  if (window.XMLHttpRequest)
  { 
      xmlHttp = new XMLHttpRequest();
      if (xmlHttp.overrideMimeType)
      {
          xmlHttp.overrideMimeType('text/xml');
      }
  }
  else if (window.ActiveXObject) { // IE 
    try
    {
          xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (e)
    {
      try
      {
              xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) {}
    }
  }

        if (!xmlHttp) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
        }
  var req = "?action="+action;
  xmlHttp.onreadystatechange = updateBody;
  xmlHttp.open("GET","injury-text.php"+req,true);
  xmlHttp.send(null)
  
  if(lastact == null)
    document.getElementById("man").style.display = "none";
  else
  {
    document.getElementById(lastact).style.display = "none";
  }
  document.getElementById(action).style.display = "block";
  lastact = action;
}

function updateBody()
{
    if(xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
    {
        
        document.getElementById("ajax_cont").innerHTML = xmlHttp.responseText;
    }
}