[HTML] pobierz, plaintext 
<script type="text/javascript">
//rezerwacje.html?checkRoomStatus=check&day=8&month=5&year=2015&roomId=6
function getSearchParameters() {
      var prmstr = window.location.search.substr(1);
      return prmstr != null && prmstr != "" ? transformToAssocArray(prmstr) : {};
}
 
function transformToAssocArray( prmstr ) {
    var params = {};
    var prmarr = prmstr.split("&");
    for ( var i = 0; i < prmarr.length; i++) {
        var tmparr = prmarr[i].split("=");
        params[tmparr[0]] = tmparr[1];
    }
    return params;
}
 
var params = getSearchParameters();
 
var ddl = document.getElementById('roomId');
function CheckAndModify(id)
{
	var xmlhttp=new XMLHttpRequest();
	xmlhttp.onreadystatechange=function() {
		if (xmlhttp.readyState===4 && xmlhttp.status===200) {
		//alert(xmlhttp.responseText);
			if (xmlhttp.responseText == "true")
			{
				ddl.options[id].style ="display: none;";
				ddl.remove(id);
			}
		}
	}
	//alert("rezerwacje.html?checkRoomStatus=check&day="+params['day']+"&month="+params['month']+"&year="+params['year']+"&roomId="+ddl.options[id].value);
	xmlhttp.open("GET","rezerwacje.html?checkRoomStatus=check&day="+params['day']+"&month="+params['month']+"&year="+params['year']+"&roomId="+ddl.options[id].value,true);
	xmlhttp.send();
}
for (i = 0; i < ddl.options.length; i++) {
	//alert("found:"+ddl.options[i].value);
   CheckAndModify(i);
   }
</script>
[HTML] pobierz, plaintext