target_image: ' + this.target_image); this.imagenames = new Array(3); // Create an array. this.imagenames[0] = this.target_image; // unselected this.imagenames[1] = this.hilite_image; // highlighted this.imagenames[2] = this.here_image; // selected // First time called, document will be false. Ignore this call. if (document == null) return; // The first time we are called (and only the first time) we have // to do some special stuff. First, now that the prototype object // is created, we can set up our methods. // Second, we've got to load the images that we'll be using. // Doing this will get the images in the cache for when we need them. if (!NavigationItem.prototype.over) { // Initialize the prototype object to create our methods. NavigationItem.prototype.over = _NavigationItem_over; NavigationItem.prototype.out = _NavigationItem_out; NavigationItem.prototype.click = _NavigationItem_click; // Now create an array of image objects, and assign URLs to them. // The URLs of the images are configurable, and are stored in an // array property of the constructor function itself. They will be // initialized below. Because of a bug in Navigator, we've got // to maintain references to these images, so we store the array // in a property of the constructor rather than using a local variable. this.images = new Array(3); for(var i = 0; i < 3; i++) { this.images[i] = new Image(NavigationItem.width, NavigationItem.height); this.images[i].src = this.imagenames[i]; } } var url = /(\w+):\/\/([\w.]+)\/(\S*)/; var text = this.document.URL; var result = text.match(url); if (result != null) { var fullurl = result[0]; // Contains full url var protocol = result[1]; // Contains "http" var host = result[2]; // Contains url host var path = result[3]; // Contains document path } this.document.write('
path: ' + path); // this.document.write('
document.URL: ' + document.URL); this.document.write('
target_URL: ' + target_URL); if (path == this.target_URL) { this.selected = true; } // Remember that the mouse is not currently on top of us. this.highlighted = false; // Save the onclick argument to be called when the button is clicked. // If it is not already a function, attempt to convert it // to a function that is passed a single argument, named state. this.onclick = onclick; // Figure out what entry in the document.images[] array the images // will be stored at. var index = document.images.length; // Now output the HTML code. Use
