var d = document;

function change_width(){
	var req = mint.Request();
	req.OnSuccess = function() {
		var xmldoc = this.responseXML;
		var szer = xmldoc.getElementsByTagName("item");
		mySelect = d.getElementById("select_dludosc");
		while (mySelect.hasChildNodes()){
			mySelect.removeChild(mySelect.firstChild);
		}
		if (szer.length == 0) return 0;
		var myOption = new Option("- Wybierz -");
		myOption.value = "0";
		mySelect.options.add(myOption,0);
		for (i=0; i<szer.length; i++){
			var myOption = new Option(szer[i].firstChild.nodeValue);
			myOption.value = szer[i].firstChild.nodeValue;
			mySelect.options.add(myOption,i+1);
		}
	}
	selSzer = d.getElementById("select_szerokosc");
	req.Set("method","POST");
	req.AddParam('szerokosc', selSzer.value);
	req.async = 'false';
	req.Send("http://www.przecinarki.pl/xml/szerokosc_response");	//	tu znajduje sie zapytanie
}