i=0;
function nwin(url) {
if(i>0 && win1.closed==false){
	win1.close();
	}
var newwin;
win1 = window.open(url,newwin,"width=600,height=400,scrollbars=yes,resizable=yes");
i++;
}

i=0;
function nwin2(url,w,h) {
if(i>0 && win2.closed==false){
	win2.close();
	}
var newwin2;
win2 = window.open(url,newwin2,'width='+w+',height='+h+',scrollbars=yes,resizable=yes'); 
i++;
}

function p(id, url, width, height, options)
{
	if (options != null) options = "," + options;
	nw = window.open(url, id, '\
	width       = '+width+',\
	height      = '+height+',\
	scrollbars  = yes,\
	resizable   = yes,\
	toolbar     = no,\
	directories = no,\
	location    = no,\
	menubar     = no,\
	status      = no' + options);
	
	nw.focus();
	return false;
}