var newwin=null;

function popup(url, name, h, w, resizable, scrollbars, bars)
{

	var nsNav = (document.layers) ? 1 : 0;
	var ieNav = (document.all) ? 1 : 0;
	var left = 0;
	var top = 0;

	if (resizable == undefined) {
	    resizable = 1;
	}
	if (scrollbars == undefined) {
	    scrollbars = 1;
	}

	/*if(ieNav){
		left = (document.body.clientWidth - w)/2;
		top = (document.body.clientHeight - h)/2;
	}
	else{
		left = (screen.width - w)/2;
		top = (screen.height - h)/2;
	}*/
	var top=(screen.height-h)/2;
  	var left=(screen.width-w)/2;

	if(bars==true) {
		wintype="toolbar=yes,menubar=yes,location=yes,scrollbars="+scrollbars+",resizable="+resizable+",top="+top+",left="+left+",height="+h+",width="+w;
	}else {
		wintype="toolbar=no,menubar=no,location=no,scrollbars="+scrollbars+",resizable="+resizable+",top="+top+",left="+left+",height="+h+",width="+w;
	}
	newwin = window.open(url,name,wintype);

	newwin.focus();

}