var scW = screen.availWidth ? screen.availWidth : screen.width;
var scH = screen.availHeight ? screen.availHeight : screen.height;

var subsitewindow = '';
	

function subsite() {
  var imageWidth = 949;
  var imageHeight = 650;
  if (!subsitewindow.closed && subsitewindow.location) {
  	  //subsitewindow.location.href = 'subsite.html';
  	  subsitewindow.focus();
  } else {
  	  subsitewindow = window.open('site.html','site','scrollbars=no,toolbar=no,menubar=no,personalbar=no,resizable=no,width='+(imageWidth)+',height='+(imageHeight)+',left='+(Math.round((scW-imageWidth)/2)+',top='+Math.round((scH-imageHeight)/2))+'');
  }
  if( subsitewindow.focus ) { 
      subsitewindow.focus(); 
  }
}