function fileUploadOnChange() {
	showWaitMsg();
	document.forms[0].submit();
}

function showWaitMsg() {
	var b = Ext.getBody();

	var g = Ext.DomHelper.insertFirst(b, {
		id: 'div_gray_out', 
		tag: 'div', 
		style: 'background-color:black;position:absolute;z-index:998;opacity:0.3;MozOpacity:0.3;filter=alpha(opacity=30);top:0px;left:0px;overflow:none;'
	}, true);
	var s = b.getViewSize();
	if (s.width > b.dom.scrollWidth) { g.setWidth(s.width); } else { g.setWidth(b.dom.scrollWidth); }
	if (s.height > b.dom.scrollHeight) { g.setHeight(s.height); } else { g.setHeight(b.dom.scrollHeight); }

	var sMsg = '<img src=\"images/wait.gif\" align=\"absmiddle\">&nbsp;&nbsp;Datei wird &uuml;bertragen...';

	var m = Ext.DomHelper.insertFirst(b, {
		id: 'div_loading_msg',
		tag: 'div',
		style: 'background-color:#eeeeee;width:200px;position:absolute;z-index:999;border:solid 1px black;text-align:center;padding-top:5px;font-family:arial,helvetica;font-size:13px;font-weight:normal;',
		html: sMsg
	}, true);
	m.setHeight(30);
	var c = m.getCenterXY();
	m.setLeft(c[0]);
	m.setTop(c[1]);
}