// JavaScript Document
function ajaxGetProdData( project, material, type) {	
	var pvalue = project.value;
	var mvalue = material.value;
	
	document.getElementById('quoteprice').innerHTML = "$";
	
	var poststr = "";
	if (pvalue != "0")
		poststr += "&Project=" + encodeURI(pvalue);
	if (mvalue != "0" && type != 'P')
		poststr += "&Material=" + encodeURI(mvalue);
	
	var http_request = false;
	var url = "./ajax_getproddata.php";
	
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
	  http_request = new XMLHttpRequest();
	} else if (window.ActiveXObject) { // IE
	  try {
		http_request = new ActiveXObject("Msxml2.XMLHTTP");
	  } catch (e) {
		try {
		  http_request = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (e) {}
	  }
	}
	
	if (!http_request) {
	  alert('Giving up :( Cannot create an XMLHTTP instance');
	  return false;
	}
	// 定義事件處理函數為 alterContents()
	http_request.onreadystatechange = function() { getProdData(http_request); };
	
	// show loading icon
	var selSize = document.getElementById('selSize');
	var selMaterial = document.getElementById('Material');
	selSize.disabled = "disabled";
	selMaterial.disabled = "disabled";
	
	// IE 6.x 和 Firefox 1.5.x 皆要 encodeURI()

	url = url + "?seed=" + Date();

	http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request.setRequestHeader("Charset", "utf-8");
	http_request.setRequestHeader("Content-length", poststr.length);
	http_request.setRequestHeader("Connection", "close");
	http_request.send(poststr);
}
	
function getProdData(http_request) {
	if (http_request.readyState == 4) {
      if (http_request.status == 200) {
        var xmldoc = http_request.responseXML;
        var nodes = xmldoc.getElementsByTagName("mydata");
        var selSize = document.getElementById('selSize');
        var Material = document.getElementById('Material');
		var init = false;
		mvalue = Material.value;		
	
		// clear target content
		selSize.options.length=1;
		Material.options.length=1;
		
		// add news
		for(var i=0; i<nodes.length; i++) {
		  thisType = nodes[i].getAttribute("type");		  
		  var thisId = "";
  		  var thisVal = "";
		  
		  if (thisType == "material")
		  {
		  	  thisId = nodes[i].getAttribute("id");
	  		  thisVal = nodes[i].firstChild.nodeValue;
			  x = new Option(thisVal, thisId);
			  x.title = thisVal;
			  Material.options[Material.length] = x;
			  if (thisId == mvalue)
			  {
				  Material.options[Material.length-1].selected = "selected";
			  }
		  }
		  else if (thisType == "size")
		  {
  		  	  thisVal = nodes[i].getAttribute("value");
	  		  thisId = nodes[i].firstChild.nodeValue;
			  x = new Option(thisId, thisVal);
			  x.title = thisId;
			  selSize.options[selSize.length] = x;
		  }
		}

		selSize.disabled = "";
		Material.disabled = "";
		
      } else {
        alert('There was a problem with the request.');
      }
    }
}