var elval;
        var opid;
        function sendRequest(params,HttpMethod){
		if (!HttpMethod){ HttpMethod="POST"; }
		req=initXMLHTTPRequest() ;
		if (req){
			req.onreadystatechange=onReadyState;
			req.open(HttpMethod,'form.php',true);
			req.setRequestHeader ("Content-Type", "application/x-www-form-urlencoded");
			req.send(params);
			}
		}
	function initXMLHTTPRequest() {
		var xRequest=null;
		// ������������� ������� �������
		if (window.XMLHttpRequest){ xRequest=new XMLHttpRequest(); }
		else if (window.ActiveXObject) {xRequest=new ActiveXObject("Microsoft.XMLHTTP");}
		return xRequest;
		}
	// ����������� ����������� ��������� ������
	function onReadyState(){
		var ready=req.readyState;

		// �������� readyState
		if (ready==4){
			// ������ ������ ������

			if (wd_mode == -1) {
				document.getElementById('opt1').innerHTML = req.responseText;
				wd_send = 0;
				}
			if (wd_mode == 1) {
				document.getElementById('opt2').innerHTML = req.responseText;
                                document.getElementById('opt2_strong').style.display = '';
                                document.getElementById('opt2').style.display = '';
				//document.getElementById('opt3').innerHTML = '<select size="1" name="sel3" style="width: 180px" disabled><option value="0"></option></select>';
				wd_send = 0;
				}
			if (wd_mode == 2) {
				document.getElementById('opt3').innerHTML = req.responseText;
                                document.getElementById('opt3_strong').style.display = '';
                                document.getElementById('opt3').style.display = '';
				wd_send = 0;
				}
			}

    

		}


	var wd_mode = 0;
	var wd_send = 0;

	function send(id, value) {
		if (value != 0 && id < 3) {
			wd_mode = id;
			sendRequest('id='+id+'&value='+value);
                        elval  = value;
                        opid  = id;

                        
                } else if (id == 3 && value != 0 ) {
                            document.getElementById("do_search").style.display = '';
                           
                } else {
			wd_send = 0;
			if (id == 1) {
                                document.getElementById('opt2_strong').style.display = 'none';
                                document.getElementById('opt2').style.display = 'none';
                                document.getElementById('opt3_strong').style.display = 'none';
                                document.getElementById('opt3').style.display = 'none';
                                document.getElementById("do_search").style.display = 'none';
                                document.getElementById('opt2').innerHTML = '<select size="1" name="sel2" style="width: 180px" disabled><option value="0"></option></select>';
				document.getElementById('opt3').innerHTML = '<select size="1" name="sel3" style="width: 180px" disabled><option value="0"></option></select>';
                        }
                        if (id == 2) {
                             document.getElementById('opt3_strong').style.display = 'none';
                             document.getElementById('opt3').style.display = 'none';
                             document.getElementById("do_search").style.display = 'none';

                             document.getElementById('opt3').innerHTML = '<select size="1" name="sel3" style="width: 180px" disabled><option value="0"></option></select>';

                        }

                        if (id == 3) {

                             document.getElementById("do_search").style.display = 'none';

				

			}

		}



        }


        function doaselect (id, val) {
                                 elm = document.getElementById('sel'+id);
                            max = elm.options.length;
                              for (var i=0; i < max; i++)
                              {
                                  if (elm.options[i].value == val)  elm.options[i].selected=true;
                              }



        }