在滑块

Question

该滑块作品预加载图像，但我只需要预先载入图像：

document.observe("dom:loaded", function(event) { 
    initSlider() 
}); 

var slider_index = 0; 
var auto_scroll = true; 
var ctime = false; 

function initSlider() { 
    $('slider-img').src = slider_images[0]; 
    $('slider-text').innerHTML = slider_text[0]; 
    $('slider-link').setAttribute('href',slider_links[0]); 
    ctime = window.setTimeout(function() { 
     sliderNext(true); 
    },7000); 
} 

function sliderPrev() { 
    changeSlide(slider_index-1); 
    clearTimeout(ctime); 
} 

function sliderNext(scroll) { 
    if (scroll == true) { 
     ctime = window.setTimeout(function() { 
      sliderNext(true); 
     },21000); 
    } else { 
     clearTimeout(ctime); 
    } 
    changeSlide(slider_index+1, scroll); 
} 

function changeSlide(target, auto) { 
    if (auto) auto_scroll = true; else auto_scroll = false; 

    if (!auto_scroll) clearTimeout(ctime); 

    var name = "slider_thumb" + slider_index; 
    $(name).removeClassName("active"); 
    slider_index = target; 
    if (slider_index >= slider_count) { 
     slider_index = 0; 
    } else if (slider_index < 0) { 
     slider_index = slider_count - 1; 
    } 
    $('slider-img').src = slider_images[slider_index]; 
    $('slider-text').innerHTML = slider_text[slider_index]; 
    $('slider-link').setAttribute('href',slider_links[slider_index]); 
    var name = "slider_thumb" + slider_index; 
    $(name).addClassName("active"); 
} 

Answer 1

// Preload Image 
$('<img />') 
    .attr('src', 'picture.jpg') 
    .load(function(){ 
     $('.slider').append($(this)); 
     // some other Code 
    });