function WinOpen(fichier,H,W,WinName)
{
	if (WinName == '')
	{
		WinName = 'popwin'
	}
	var avwidth = screen.availWidth;
	var avheight = screen.availHeight;
	avwidth = (avwidth - W)/2;
	avheight = (avheight - H)/2;
	window.open(fichier,WinName,"scrollBars=yes,height="+H+",width="+W+",top="+avheight+",left="+avwidth+" resizable=yes")
}