var xmlHttpprevious

function showprevious (str)
{
	
	xmlHttpprevious=GetXmlHttpObjectprevious()
	if (xmlHttpprevious==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 
	var url="session.php"
	url=url+"?q="+str
	url=url+"&sid="+Math.random()
	xmlHttpprevious.onreadystatechange=stateChangedprevious 
	xmlHttpprevious.open("GET",url,true)
	xmlHttpprevious.send(null)
} 

function stateChangedprevious() 
{ 
	if (xmlHttpprevious.readyState==4 || xmlHttpprevious.readyState=="complete")
	{ 
		document.getElementById("previous").innerHTML=xmlHttpprevious.responseText 
	} 
} 

function GetXmlHttpObjectprevious()
{ 
	var objXMLHttp=null
	if (window.XMLHttpRequest)
	{
	objXMLHttp=new XMLHttpRequest()
	}
	else if (window.ActiveXObject)
	{
	objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
}