   <!--
    var iPath = 'images/';
    var iExt = 'gif';
    var suffix = new Array('on','off');
    var loaded = false;

    function preLoad()
    {
     if(document.images)
     {
      var argLength = arguments.length;
      for(var i = 0; i < argLength; i++)
      {
       var arg = arguments[i];
       for(j = 0; j < suffix.length; j++)
       {
        var suf = suffix[j];
		iNew = arg + '_' + suf + ' = new Image();';  eval(iNew);
		iSrc = arg + '_' + suf + '.src = \'' + iPath + arg + '_' + suf + '.' + iExt + '\';';  eval(iSrc);
       }
      }
      loaded = true;
     }
    }

window.onLoad = preLoad('header_logo','header_about','header_portfolio','header_contact');

function rollOver(iName,iState)
    {
      if(document.images)
      {
        document.images[iName].src = eval(iName + '_' + iState + '.src');
      }
    }

  // -->