// Image object implemented in Netscape 3 and above
  if ( (navigator.appName == "Netscape") && navigator.appVersion.substring(0,1) > 2 ) {
    BrowserOK = true;
    }

    // and MSIE 4 and above
  else if ( navigator.appVersion.indexOf("MSIE") != -1 ) {
    BrowserMSIE3 = true;
    BrowserOK = false;
    if (navigator.appVersion.substring(0,1) > 3) {
      BrowserOK = true;
      }
    }

  // otherwise ignore image object
  else BrowserOK = false;

// preloadMouseovers
if (BrowserOK) {
	janImg = new Image();
	janImg.src = "jan_sel.gif";
	febImg = new Image();
	febImg.src = "feb_sel.gif";
	marImg = new Image();
	marImg.src = "mar_sel.gif";
	aprImg = new Image();
	aprImg.src = "apr_sel.gif";
	mayImg = new Image();
	mayImg.src = "may_sel.gif";
	junImg = new Image();
	junImg.src = "jun_sel.gif";
	julImg = new Image();
	julImg.src = "jul_sel.gif";
	augImg = new Image();
	augImg.src = "aug_sel.gif";
	sepImg = new Image();
	sepImg.src = "sep_sel.gif";
	octImg = new Image();
	octImg.src = "oct_sel.gif";
	novImg = new Image();
	novImg.src = "nov_sel.gif";
	decImg = new Image();
	decImg.src = "dec_sel.gif";
	butImg = new Image();
	butImg.src = "upbut_sel.gif";
	}


  function highlight(country, month) {
  if (BrowserOK){
     eval("document." + country + month + ".src ='" + month + "_sel.gif'");
    }
  }

  function dim(country, month) {
  if (BrowserOK){
     eval("document." + country + month + ".src ='" + month + ".gif'");
    }
  }

  function but_on(button) {
  if (BrowserOK){
     eval("document." + button + ".src = 'upbut_sel.gif'");
    }
  }

  function but_off(button) {
  if (BrowserOK){
     eval("document." + button + ".src = 'upbut.gif'");
    }
  }