/* Transport Benevolent Fund - JavaScript
----------------------------------------------------------------------------------------------------*/





/* Preload images required for header navigation.
----------------------------------------------------------------------------------------------------*/
function preload() {  
  if (document.images) {
    i1ovr = new Image(); i1ovr.src = '/images/mh6a.gif';
    i1off = new Image(); i1off.src = '/images/mh6.gif';
    i2ovr = new Image(); i2ovr.src = '/images/mh7a.gif';
    i2off = new Image(); i2off.src = '/images/mh7.gif';
    i3ovr = new Image(); i3ovr.src = '/images/mh8a.gif';
    i3off = new Image(); i3off.src = '/images/mh8.gif';
    i4ovr = new Image(); i4ovr.src = '/images/mh9a.gif';
    i4off = new Image(); i4off.src = '/images/mh9.gif';
    i5ovr = new Image(); i5ovr.src = '/images/mh10a.gif';
    i5off = new Image(); i5off.src = '/images/mh10.gif';
  }  
}





/* Functions to swap images.
----------------------------------------------------------------------------------------------------*/

function swapImageOn(imageName){
  if (document.images){
    document[imageName].src = eval(imageName + 'ovr.src');
  }
}





/* Functions to swap images.
----------------------------------------------------------------------------------------------------*/

function swapImageOff(imageName){
  if (document.images){
    document[imageName].src = eval(imageName + 'off.src');
  }
}





/* Functions to swap images.
----------------------------------------------------------------------------------------------------*/

var lsBef = '';
function elmClear(fld) {
  lsBef = fld.value;
  fld.value = '';
}

function elmFill(fld) {
  fld.value = lsBef;
}





/* Onload functions
----------------------------------------------------------------------------------------------------*/

window.onload = new function() {
  preload();
}