<script language="javascript">
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;
}

function showPage(str) {
/*
	if (str.length<3) { 
  		document.getElementById("window").innerHTML="";
  		return;
	}
*/
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
  		alert ("Your browser does not support AJAX!");
  		return;
  	} 
	var url="search.php?str="+str;
	alert(url);
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() { 
	if (xmlHttp.readyState==4) { 
		document.getElementById("window").innerHTML=xmlHttp.responseText;
	}
}
</script>