function createObject()
{
    var request_type;
    var browser=navigator.appName;
    if(browser=="Microsoft Internet Explorer")
    {
        request_type=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {
        request_type=new XMLHttpRequest();
    }
    return request_type;
}

var http=createObject();

function ajax_search(var1,var2)
{
    var ajax_search_value=encodeURI(document.getElementById(var1).value);
    nocache=Math.random();
    http.open('get', 'search_ajax.php?'+var1+'='+ajax_search_value+'&nocache='+nocache);
    http.onreadystatechange=ajax_reply;
    function ajax_reply()
    {
		if (http.readyState==4)
		{
			var response=http.responseText;
			document.getElementById(var2).innerHTML=response;
		}
		else if (http.readyState==1)
		{
			document.getElementById(var2).innerHTML="<img src='images/ajax-loader.gif' alt='загрузка..'>";
		}
    }
    http.send(null);
}