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

addLoadEvent(setall);
addLoadEvent(function() {
  /* more code to run on page load */ 
});


function setall() {
document.getElementById('par1').style.display = 'none';
document.getElementById('par2').style.display = 'none';
document.getElementById('par3').style.display = 'none';
document.getElementById('par4').style.display = 'none';
document.getElementById('par5').style.display = 'none';
document.getElementById('par6').style.display = 'none';
document.getElementById('par7').style.display = 'none';
document.getElementById('par8').style.display = 'none';
document.getElementById('par9').style.display = 'none';
document.getElementById('par10').style.display = 'none';
}



function display(obj) {
var el = document.getElementById(obj);
if ( el.style.display != 'none' ) {
	el.style.display = 'none';
}
else {
	el.style.display = 'block';
}
}