// pre-load main navigation rollover images

if (document.images) {

  ar1_on = new Image(); ar1_off = new Image(); 
  ar2_on = new Image(); ar2_off = new Image();  
  ar3_on = new Image(); ar3_off = new Image();  
  ar4_on = new Image(); ar4_off = new Image();  
  ar5_on = new Image(); ar5_off = new Image();  
 

  ar1_on.src = "images/arrowa1.gif"; ar1_off.src = "images/arrow1.gif";
  ar2_on.src = "images/arrowa2.gif"; ar2_off.src = "images/arrow2.gif";
  ar3_on.src = "images/arrowa3.gif"; ar3_off.src = "images/arrow3.gif";
  ar4_on.src = "images/arrowa4.gif"; ar4_off.src = "images/arrow4.gif";
  ar5_on.src = "images/arrowa5.gif"; ar5_off.src = "images/arrow5.gif";
  	
}

// rollover functions

function on(imageName) {
        if (document.images) document[imageName].src = eval(imageName + "_on.src");
}

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


// full window function
function fullWindow(url) { 
    var str = "left=0,screenX=0,top=0,screenY=0,resizable";
    if (window.screen) {
      var ah = screen.availHeight - 30;
      var aw = screen.availWidth - 10;
      str += ",height=" + ah;
      str += ",innerHeight=" + ah;
      str += ",width=" + aw;
      str += ",innerWidth=" + aw;
    }
    win=window.open(url, "w", str);
}