function openCalc() {
    window.open("mortgage-calculator-popup.html", "popupcalc", "height=300,width=325,toolbar=no,menubar=no,top=100,left=20");
  }
  
  function openSearchFeatures() {
    window.open("http://www.corburn.com/gidx_search.php", "popupidx", "height=520,width=750,toolbar=no,menubar=no,top=100,left=20,scrollbars,resizable");
  }
  
  function openCorburnSearch() {
    window.open("http://www.corburn.com/gidx_search.php?content=prop_search", "popupidx", "height=520,width=750,toolbar=no,menubar=no,top=100,left=20,scrollbars,resizable");
  }
  
  	if (document.images) {
	aon = new Image(90,40);
    aon.src = "images/nav-about-2.gif";
    aoff = new Image(90,40);
    aoff.src = "images/nav-about-1.gif";

	bon = new Image(146,40);
    bon.src = "images/nav-const-2.gif";
    boff = new Image(146,40);
    boff.src = "images/nav-const-1.gif";
	
	con = new Image(137,40);
    con.src = "images/nav-devel-2.gif";
    coff = new Image(137,40);
    coff.src = "images/nav-devel-1.gif";
	
	don = new Image(120,40);
    don.src = "images/nav-real-2.gif";
    doff = new Image(120,40);
    doff.src = "images/nav-real-1.gif";
	
	}
		  
    function img_act(imgName) {
    if (document.images) {
    imgOn = eval(imgName + "on.src");
    document [imgName].src = imgOn;
    }
    }
	
    function img_inact(imgName) {
    if (document.images) {
    imgOff = eval(imgName + "off.src");
    document [imgName].src = imgOff;
    }
    }