function NewWindow(mypage, myname, w, h, scroll) {
		var winl = (screen.width - w) / 2;
		var wint = (screen.height - h) / 2;
		winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
		win = window.open(mypage, myname, winprops)
		if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
	}
	
	function showQplayerDemo(){
		var url = "media/qplayer_demo/";
		NewWindow(url,'Qplayer','820','620','no');
	}
	
	function showProtectionDonnee(){
		var url = "protection_donnee.html";
		NewWindow(url,'CHarte','500','300','no');
	}
	
	function cryptMail(str){
		alert(str);
		var a = str;
		var b = "@";
		var c = "e-teach";
		var d = ".ch";
		return "<a href='"+"mail"+"to:"+a+b+c+d+"'>"+a+b+c+d+"</a>";
	}