function printPage () {
window.print();
}

function initPrint () {
	try
  {
  document.getElementById('printBtn').onclick = printPage;
  }
catch(err)
  {
  return
  }

}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent( function() { initPrint()} )