function start_overlayer(lang) {
	
	var path="/comuni/overlayer_virtualopenday/";
	
	if(lang=="it"){
	var clickTag="http://www.virtualopenday.sdabocconi.it/?l=it";
	}else{
	var clickTag="http://www.virtualopenday.sdabocconi.it/";
	}
	
	$(document.body).setStyle({position:"relative", width:"100%", height:"100%"});
	var d = 1024;//document.documentElement.clientWidth;
	var fader = document.createElement('div');
	fader.setAttribute('id', 'fader');
	document.body.appendChild(fader);
	$('fader').setStyle({zIndex:"1000",position:"absolute",top:"0",bottom:"0",left:"0",width:"100%",background:"#000000",opacity:"0.5",filter:"alpha(opacity=50)",height:"100%",MozOpacity:"0.5"});
	var flashcarrier = document.createElement('div');
	flashcarrier.setAttribute('id', 'flashcarrier');
	document.body.appendChild(flashcarrier);
	$('flashcarrier').setStyle({position:"absolute",border:"10px solid #CCCCCC",top:"100px",left:((d/2)-275)+"px",zIndex:"10001",width:"550px",height:"420px",backgroundColor:"#CCCCCC"});
	$('flashcarrier').update('<div style="height:20px;clear:both;text-align:right;"><a href="javascript:close_overlayer()" style="font-family:Arial;font-size:12px;text-decoration:none;color:#999999">CHIUDI</a></div><div><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="550" height="400" id="overlayer" align="middle"><param name="allowScriptAccess" value="sameDomain" /><param name="allowFullScreen" value="false" /><param name="movie" value="'+path+'overlayer_'+lang+'.swf?clickTag='+clickTag+'" /><param name="quality" value="high" /><param name="bgcolor" value="#ffffff" />	<embed src="'+path+'overlayer_'+lang+'.swf?clickTag='+clickTag+'" quality="high" bgcolor="#ffffff" width="550" height="400" name="overlayer_'+lang+'" align="middle" allowScriptAccess="sameDomain" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /></object></div>');
	fader.observe("click", close_overlayer);
	//Element.extend(document.body).setStyle({position:"relative", width:"100%", height:"100%"});
	//var d = Element.extend(document.body).getWidth();
	//var path="../banner/overlayer_virtualopenday/";
	//var d = Element.extend($$('body')).getWidth();//window.document.body.getWidth()
	// Element.extend(document.body);//document.body.getWidth();
	//$$('body').setStyle({position:"relative", width:"100%", height:"100%"});
	//fader.setAttribute('style', 'z-index:1000;position:absolute;top:0;bottom:0;left:0;width:100%;background:#000;opacity:0.45;-moz-opacity:0.45;filter:alpha(opacity=45);height:100%;');
	//a.appendChild(document.createTextNode("Next page"));
	//var fader = new Element("DIV", {id:"fader", style:"z-index:1000;position:absolute;top:0;bottom:0;left:0;width:100%;background:#000;opacity:0.45;-moz-opacity:0.45;filter:alpha(opacity=45);height:100%;"});
	//flashcarrier.setAttribute('style','position:absolute;border:10px solid #CCCCCC;top:100px;left:'+((d/2)-275)+'px;z-index:100;width:550px;height:420px;background-color:#CCCCCC');
	//flashcarrier = new Element("DIV", {id:"flashcarrier", style:"position:absolute;border:10px solid #CCCCCC;top:100px;left:"+((d/2)-275)+"px;z-index:100;width:550px;height:420px;background-color:#CCCCCC"});
	//document.observe("scroll", close_overlayer);
}
function close_overlayer() {
	$("fader").hide();
	$("flashcarrier").hide();
}