function removeAltText() {
  var allElement = document.getElementById('removeAlt');
  if(allElement) {
    var imgs =  allElement.getElementsByTagName("IMG"); 
    for(i=0; i<imgs.length; i++) { 
	imgs[i].alt = ""; 
	imgs[i].title = ""; 
    } 
  }
  var singleElement = document.getElementById('removeAltSingle');
  if(singleElement)
    singleElement.getElementsByTagName("IMG")[0].alt = "";
}

Tangora.Events.AddHandler (window, "onload", removeAltText);