var xmlhttp;

	function main(str)
	{
		xmlhttp=GetXmlHttpObject();
		if (xmlhttp==null)
		{
			alert ("Browser does not support HTTP Request");
			return;
		}
		
		
		var url="main.php";
		url=url+"?q="+str;
		
		url=url+"&sid="+Math.random();
		xmlhttp.onreadystatechange=stateChanged;
		xmlhttp.open("GET",url,true);
		xmlhttp.send(null);
	}

	function stateChanged()
	{
		if (xmlhttp.readyState==4)
		{
			document.getElementById("demo").innerHTML=xmlhttp.responseText;
		}
	}

	function GetXmlHttpObject()
	{
		if (window.XMLHttpRequest)
		{
			// code for IE7+, Firefox, Chrome, Opera, Safari
			return new XMLHttpRequest();
			
		}
		if (window.ActiveXObject)
		{
			// code for IE6, IE5
			
			return new ActiveXObject("Microsoft.XMLHTTP");
			
		}
		return null;
}