function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}
function optOver(option, id)
{
	if (document.getElementById (option+'_'+id).className != 'swatchSelect')
	{		
		document.getElementById (option+'_'+id).className = 'swatchHover';
	}
}

function optOut(option, id)
{
	if (document.getElementById (option+'_'+id).className != 'swatchSelect')
	{
		document.getElementById (option+'_'+id).className = 'swatchAvailable';
	}
}

function optClick(option, id, title)
{
	old_id = document.getElementById ('opts_'+option).value;
	if (old_id > 0)
	{
		document.getElementById (option+'_'+old_id).className = 'swatchAvailable';
	}
	document.getElementById (option+'_'+id).className = 'swatchSelect';
	document.getElementById ('opts_'+option).value = id;
	//document.getElementById ('selected_'+option).innerHTML = title;
}
var GB_ROOT_DIR = "/javascript/cycling/greybox/";