var xmlHttp

var str=0;

//document.getElementById("prev").disabled = true;

function prev()

{

	if(str!=0)

	{

	str=str-3;

		if(str==0)

		{

		document.getElementById("but_prev").style.visibility = 'hidden';

		}	

		document.getElementById("but_next").style.visibility = 'visible';

	}

	

}

function next(records)

{

	

	str=str+3;

	if(str>0)

		{

		document.getElementById("but_prev").style.visibility = 'visible';

		}

	if(str>(records-4))

	{

	document.getElementById("but_next").style.visibility = 'hidden';

	}	

}



function showNew(records)

{ 

xmlHttp=GetXmlHttpObject()

if (xmlHttp==null)

 {

 alert ("Browser does not support HTTP Request")

 return

 }

var url="connect.php"

url=url+"?q="+str

//url=url+"&sid="+Math.random()

xmlHttp.onreadystatechange=stateChanged 

xmlHttp.open("GET",url,true)

xmlHttp.send(null)

	if(str==0)

	{

	document.getElementById("but_prev").style.visibility = 'hidden';

	//document.getElementById("but_prev").disabled = true;

	}	

	if(str>(records-4))

	{

	document.getElementById("but_next").style.visibility = 'hidden';

	}

}



function stateChanged() 

{ 

if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")

 { 

 document.getElementById("new").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;

}