function showHint(str)
{
if (str.length==0)
  { 
  document.getElementById("cal_content").innerHTML="";
  return;
  }
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    	var cTxt = xmlhttp.responseText;
		var word1 = cTxt.split('<div id="ajaxContentStart" ></div>');
		var word2 = word1[1].split('<div id="ajaxContentEnd" ></div>');
		document.getElementById("cal_content").innerHTML=word2[0];
		//document.getElementById("cal_content").innerHTML=xmlhttp.responseText;
    }  else {
		document.getElementById("cal_content").innerHTML= "Loading... <img src='images/loader_white.gif' />";
	}
  }
xmlhttp.open("GET","ajax.aspx?dt="+str,true);
xmlhttp.send();
}