function testDetect() {
  window.document.getElementById('myformregister').action = 'profile.php?jcheck=mspam';
}

function postDetect() {
  var jck = '';
  
  if (window.document.getElementById('myformposting').action.indexOf('?') == -1) {
    jck = '?jcheck=mspam'; 
  } else {
	jck = '&jcheck=mspam';  
  }
  
  window.document.getElementById('myformposting').action = window.document.getElementById('myformposting').action+jck;

}