var xmlhttp = false;

try {
	xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
	try {
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	} catch (E) {
		xmlhttp = false;
	}
}

if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
	xmlhttp = new XMLHttpRequest();
}

function refreshSelects (classes, codes, selElements ) 
{		
	//classes: 1,4,5,8
	//codes: 001,,004,
	//selElements: array met de select elementen
	if (xmlhttp) {
		if (xmlhttp.readyState >= 1 && xmlhttp.readyState <= 3) {
			xmlhttp.abort();
		}
		var url = 'webshop_get_assortment.asp?classes=' + classes + '&codes=' + codes;
		//alert(url);
		xmlhttp.open("GET", url, true);	
		
		//window.location.href = ("webshop_get_assortment.asp?classes="+classes+"&codes="+codes);
		xmlhttp.onreadystatechange = function () {
            if(xmlhttp.readyState == 4){
				var optctr, selCode, sel, result;
				result = new Array();
				response = xmlhttp.responseText;
										
			//	alert(response);
				eval(response);				
				//nu kan de array gebruikt worden
				//result[classid][code] = 'desc';
				//alert(result[999]['sql']);
				
				//document.getElementById("sql").innerHTML = result['sql'];				
			
				//rebuild all selects
				for( var key in selElements ){				
					sel = selElements[key];			
					selCode = sel.options[sel.selectedIndex].value;								
					optctr = 0;
					sel.options.length = 0;
					sel.options[optctr] =  new Option("------","",false);
					for(var classid in result){
						if(key == classid){
							codes = result[classid];
							for(var code in codes){												
								optctr++;
								if(selCode == code){									
									selElements[classid].options[optctr] =  new Option(codes[code],""+code+"", true, true);
								}
								else
									selElements[classid].options[optctr] =  new Option(codes[code],""+code+"", false, false);
							} 
						}
					}
					if(optctr > 0 ) sel.disabled = false;
				}
				progressdone = true;
            }
		}
		xmlhttp.send(null);
	}
}