function callback_open(kdnr, sc, freetext)
			{
				if (navigator.appName == "Netscape")
					{
						intHeight = 230
					}
				else
					{
						intHeight = 215
					}
				if (!window.callback) 
					{
						callback = window.open('http://www.e-supporter.de/callback/callback_form.php?resize=1&kdnr=' + kdnr +'&sc=' + sc +'&freetext=' + freetext,'CallbackWin','width=500, height=240, toolbar=no, menubar=no, location=no, scrollbars=no, resizeable=no'); 
					}
				else 
					{
						if (!callback.closed)
							{
								callback.focus();
							}
							else
							{
								callback = window.open('http://www.e-supporter.de/callback/callback_form.php?resize=1&kdnr=' + kdnr +'&sc=' + sc +'&freetext=' + freetext,'CallbackWin','width=500, height=240, toolbar=no, menubar=no, location=no, scrollbars=no, resizeable=no'); 
							}
					}
			}