function ajaxObject(layer, url) {  	                            		// This is the object constructor   
	var that=this;                                                    	// A workaround for some javascript idiosyncrocies   
	var updating = false;                                             	// Set to true if this object is already working on a request   
	this.callback = function() {}                                     	// A post-processing call -- a stub you overwrite.   
	
	this.update = function(passData) 
		{                                										// Initiates the server call.     
		if (updating==true) { return false; }                          			// Abort if we're already processing a call.      
		updating=true;                                                 			// Set the updating flag.      
		var AJAX = null;                                               			// Initialize the AJAX variable.      
			if (window.XMLHttpRequest) 
				{                                   							// Are we working with mozilla?         
				AJAX=new XMLHttpRequest();                                  	//  Yes -- this is mozilla.      
				} 
			else 
				{                                                       		// Not Mozilla, must be IE         
				AJAX=new ActiveXObject("Microsoft.XMLHTTP");                	//  Wheee, ActiveX, how do we format c: again?      
				}                                                             	// End setup Ajax.      
			if (AJAX==null) 
				{                                              					// If we couldn't initialize Ajax...         
				alert("Ihr Browser unterstützt kein HTTP Request,"+'\n'+"bitte updaten Sie Ihren Browser !");                	// Sorry msg.                                                       
				return false;                                                	// Return false (WARNING - SAME AS ALREADY PROCESSING!)      
				}
			else 
				{
				AJAX.onreadystatechange = function() 							// When the browser has the request info..           
					{          
					if (AJAX.readyState==4 || AJAX.readyState=="complete") 		//   see if the complete flag is set.   
						{ 			            
						LayerID.innerHTML=AJAX.responseText;                  	//   It is, so put the new data in the object's layer               
						delete AJAX;                                          	//   delete the AJAX object since it's done.               
						updating=false;                                       	//   Set the updating flag to false so we can do a new request               
						that.callback();                                      	//   Call the post-processing function.            
						}                                                       // End Ajax readystate check.         
					}                                                           // End create post-process fucntion block.        
				var timestamp = new Date();                                 	// Get a new date (this will make the url unique)        
				var uri=urlCall+'?'+passData+'&timestamp='+(timestamp*1);   	// Append date to url (so the browser doesn't cache the call)         
				AJAX.open("GET", uri, true);                               		// Open the url this object was set-up with.         
				AJAX.send(null);                                            	// Send the request.         
				return true;                                               		// Everything went a-ok.      
				}                                                              	// End Ajax setup aok if/else block                    
		}					
		
	// This area set up on constructor calls.   
 	var LayerID = document.getElementById(layer);                     		// Remember the layer associated with this object.   
	var urlCall = url;  													// Remember the url associated with this object.
} 																		 // End AjaxObject

//  var getos = new ajaxObject('osHint', 'getos.php');
//  var getosname = new ajaxObject('artikelname', 'getos2.php');
//  var getospreis = new ajaxObject('artikelpreis', 'getos3.php');
//  var osadd = new ajaxObject('cart_button', 'osadd.php');
//  var osadd2 = new ajaxObject('cart_button2', 'osadd2.php');

  
  
// os_art ist artikelnummer vom Betriebssystem aus Auswahlfeld
// kps_art ist artikelnummer vom KPS
// kps_preis ist Preis vom KPS
function showos(os_art, kps_art, kps_preis) 
	{
 //  wichtige variablen für Ajax (Betriebssytemauswahl bei KPS_Info), nur hier funktionieren auch (oshint,osadd2)
  var getos = new ajaxObject('osHint', 'getos.php');
  var getosname = new ajaxObject('artikelname', 'getos2.php');
  var getospreis = new ajaxObject('artikelpreis', 'getos3.php');
  var osadd = new ajaxObject('cart_button', 'osadd.php');
  var osadd2 = new ajaxObject('cart_button2', 'osadd2.php');

	getos.update("q="+os_art+"&z="+kps_art+"&pr="+kps_preis);
	getosname.update("q="+os_art+"&z="+kps_art+"&pr="+kps_preis);
	getospreis.update("q="+os_art+"&z="+kps_art+"&pr="+kps_preis);
	osadd.update("q="+os_art+"&z="+kps_art+"&pr="+kps_preis);
	osadd2.update("q="+os_art+"&z="+kps_art+"&pr="+kps_preis);
	}