function ajaxFunction(){
	var xmlHttp;
  	try{
    	// Firefox, Opera 8.0+, Safari
	    xmlHttp=new XMLHttpRequest();
    }catch (e){
    	// Internet Explorer
    	try{
    		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
	    }catch (e){
    		try{
        		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
	        }catch (e){
		    	alert("Your browser does not support AJAX!");
    		    return false;
        	}
    	}
	}
	xmlHttp.onreadystatechange=function(){
      	if(xmlHttp.readyState==4){
      		var responce = xmlHttp.responseText;
		}
    };
    xmlHttp.open("GET","example.php",true);
    xmlHttp.send(null);
}