//rollover.js adapted for button rollovers for the San Antonio Index page


NS4 = (document.layers);
IE4 = (document.all);
ver4 = (NS4 || IE4);
browserOK = document.images;
isMac = (navigator.appVersion.indexOf("Mac") != -1);

  // ok, we have a JavaScript browser
  var browserOK = false;
  var pics;
  if (ver4) browserOK = true;
  pics = new Array();

var objCount = 0;

function preload(name, first, second, third) {  
  if (browserOK) {     
    pics[objCount] = new Array(4);
    pics[objCount][0] = new Image();
    pics[objCount][0].src = first;
    pics[objCount][1] = new Image();
    pics[objCount][1].src = second;
	pics[objCount][2] = new Image();
    pics[objCount][2].src = third;
    pics[objCount][3] = name;
    objCount++;
  }
}

function on(name){
  if (browserOK) {
     for (i = 0; i < objCount; i++) {
      if (document.images[pics[i][3]] != null)
        if (name != pics[i][3]) { 
          // set back all other images
          document.images[pics[i][3]].src = pics[i][0].src;
        } else {
           // show the second image
           document.images[pics[i][3]].src = pics[i][1].src;
        }
    }
  }
}

function off(){
  if (browserOK) {
     for (i = 0; i < objCount; i++) {
      // set back all images
      if (document.images[pics[i][3]] != null) 
        document.images[pics[i][3]].src = pics[i][0].src;
    }
  }
}

function down(name){
  if (browserOK) {
     for (i = 0; i < objCount; i++) {
      if (document.images[pics[i][3]] != null)
        if (name != pics[i][3]) { 
          // set back all other images
          document.images[pics[i][3]].src = pics[i][0].src;
        } else {
           // show the second image
           document.images[pics[i][3]].src = pics[i][2].src;
        }
    }
  }
}

// preload images - you have to specify which images should be preloaded
// and which Image-object on the web-page they belong to (this is the first
// argument). 


preload("btn-alamo", "btn-alamo-3561-off.jpg", "btn-alamo-3561-ov.jpg", "btn-alamo-3561-dn.jpg");
preload("btn-alamo-s", "btn-alamo-s-off.jpg", "btn-alamo-s-ov.jpg", "btn-alamo-s-dn.jpg");
preload("btn-arneson", "btn-arneson-off.jpg", "btn-arneson-ov.jpg", "btn-arneson-dn.jpg");
preload("btn-walk", "btn-walk-off.jpg", "btn-walk-ov.jpg", "btn-walk-dn.jpg");
preload("btn-boat", "btn-boat-off.jpg", "btn-boat-ov.jpg", "btn-boat-dn.jpg");
preload("btn-hotel", "btn-hotel-off.jpg", "btn-hotel-ov.jpg", "btn-hotel-dn.jpg");
preload("btn-william", "btn-william-off.jpg", "btn-william-ov.jpg", "btn-william-dn.jpg");
preload("btn-mercado", "btn-mercado-off.jpg", "btn-mercado-ov.jpg", "btn-mercado-dn.jpg");
preload("btn-menger", "btn-menger-off.jpg", "btn-menger-ov.jpg", "btn-menger-dn.jpg");