var xmlHttp

function showgenbr(str)
{
if (str.length==0)
  { 
  document.getElementById("gentab").innerHTML='<p>The list will refresh itself every time you change the search term. For example, if you want to see all generic medications starting with "A", just enter this letter. Pressing "Search" button is not necessarily. To narrow down search results enter as much letters from the beginning of the drug name as you remember.</p>';
  return;
  }
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 

document.getElementById("gentab").innerHTML="<p>Searching. Please wait...</p>";

var url="showgb.php";
url=url+"?"+str;
url=url+",sid="+Math.random();
xmlHttp.onreadystatechange=showgenChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function showbrgen(str)
{
if (str.length==0)
  { 
  document.getElementById("brtab").innerHTML='<p>The list will refresh itself every time you change the search term. For example, if you want to see all Brand-Name medications starting with "B", just enter this letter. Pressing "Search" button is not necessarily. To narrow down search results enter as much letters from the beginning of the drug name as you remember.</p>';
  return;
  }
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 

document.getElementById("brtab").innerHTML="<p>Searching. Please wait...</p>";

var url="showbg.php";
url=url+"?"+str;
url=url+",sid="+Math.random();
xmlHttp.onreadystatechange=showbrChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function showgenChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("gentab").innerHTML=xmlHttp.responseText;
}
}

function showbrChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("brtab").innerHTML=xmlHttp.responseText;
}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}