function openWin(url, width, height, winname) {     
	windowName  = winname;
	params      = "toolbar=0,";
	params     += "location=0,";
	params     += "directories=0,";
	params     += "status=0,";
	params     += "menubar=0,";
	params     += "scrollbars=1,";
	params     += "resizable=1,";
	params     += "top=0,";
	params     += "left=0,";
	
	params += "width="+width+",";
	params += "height="+height;
	
	win = window.open(url, windowName, params);
	win.opener.name = "opener";
	win.focus();
}