我为 Jquery 内容滑块做了这个很好的教程：http: //brenelz.com/blog/build-a-content-slider-with-jquery/
这是我的测试页面： http ://www.gregquinn.com/oneworld/brenez_slider_test.html
但是左键隐藏在第一张幻灯片上，我不希望它隐藏。我对 jquery 了解不多，但我尝试将左按钮从不透明度 o 设置为 100 或 1，但它不起作用按钮出现一次但不起作用。有谁知道如何做到这一点？这是代码：
(function($) {
$.fn.ContentSlider = function(options)
{
var defaults = {
leftBtn : 'images/panel_previous_btn.gif',
rightBtn : 'images/panel_next_btn.gif',
width : '900px',
height : '400px',
speed : 400,
easing : 'easeOutQuad',
textResize : false,
IE_h2 : '26px',
IE_p : '11px'
}
var defaultWidth = defaults.width;
var o = $.extend(defaults, options);
var w = parseInt(o.width);
var n = this.children('.cs_wrapper').children('.cs_slider').children('.cs_article').length;
var x = -1*w*n+w; // Minimum left value
var p = parseInt(o.width)/parseInt(defaultWidth);
var thisInstance = this.attr('id');
var inuse = false; // Prevents colliding animations
function moveSlider(d, b)
{
var l = parseInt(b.siblings('.cs_wrapper').children('.cs_slider').css('left'));
if(isNaN(l)) {
var l = 0;
}
var m = (d=='left') ? l-w : l+w;
if(m<=0&&m>=x) {
b
.siblings('.cs_wrapper')
.children('.cs_slider')
.animate({ 'left':m+'px' }, o.speed, o.easing, function() {
inuse=false;
});
if(b.attr('class')=='cs_leftBtn') {
var thisBtn = $('#'+thisInstance+' .cs_leftBtn');
var otherBtn = $('#'+thisInstance+' .cs_rightBtn');
} else {
var thisBtn = $('#'+thisInstance+' .cs_rightBtn');
var otherBtn = $('#'+thisInstance+' .cs_leftBtn');
}
if(m==0||m==x) {
thisBtn.animate({ 'opacity':'0' }, o.speed, o.easing, function() { thisBtn.hide(); });
}
if(otherBtn.css('opacity')=='0') {
otherBtn.show().animate({ 'opacity':'1' }, { duration:o.speed, easing:o.easing });
}
}
}
function vCenterBtns(b)
{
// Safari and IE don't seem to like the CSS used to vertically center
// the buttons, so we'll force it with this function
var mid = parseInt(o.height)/2;
b
.find('.cs_leftBtn img').css({ 'top':mid+'px', 'padding':0 }).end()
.find('.cs_rightBtn img').css({ 'top':mid+'px', 'padding':0 });
}
return this.each(function() {
$(this)
// Set the width and height of the div to the defined size
.css({
width:o.width,
height:o.height
})
// Add the buttons to move left and right
.prepend('<a href="#" class="cs_leftBtn"><img src="'+o.leftBtn+'" /></a>')
.append('<a href="#" class="cs_rightBtn"><img src="'+o.rightBtn+'" /></a>')
// Dig down to the article div elements
.find('.cs_article')
// Set the width and height of the div to the defined size
.css({
width:o.width,
height:o.height
})
.end()
// Animate the entrance of the buttons
.find('.cs_leftBtn')
.css('opacity','0')
.hide()
.end()
.find('.cs_rightBtn')
.hide()
.animate({ 'width':'show' });
// Resize the font to match the bounding box
if(o.textResize===true) {
var h2FontSize = $(this).find('h2').css('font-size');
var pFontSize = $(this).find('p').css('font-size');
$.each(jQuery.browser, function(i) {
if($.browser.msie) {
h2FontSize = o.IE_h2;
pFontSize = o.IE_p;
}
});
$(this).find('h2').css({ 'font-size' : parseFloat(h2FontSize)*p+'px', 'margin-left' : '66%' });
$(this).find('p').css({ 'font-size' : parseFloat(pFontSize)*p+'px', 'margin-left' : '66%' });
$(this).find('.readmore').css({ 'font-size' : parseFloat(pFontSize)*p+'px', 'margin-left' : '66%' });
}
// Store a copy of the button in a variable to pass to moveSlider()
var leftBtn = $(this).children('.cs_leftBtn');
leftBtn.bind('click', function() {
if(inuse===false) {
inuse = true;
moveSlider('right', leftBtn);
}
return false; // Keep the link from firing
});
// Store a copy of the button in a variable to pass to moveSlider()
var rightBtn = $(this).children('.cs_rightBtn');
rightBtn.bind('click', function() {
if(inuse===false) {
inuse=true;
moveSlider('left', rightBtn);
}
return false; // Keep the link from firing
});
});
} })(jQuery)