DIV CSS 佈局教程網

 這裡演示當當網的品牌店鋪首頁效果，演示地址為：http://static.dangdang.com/gm/topic/2270_181320.shtml

效果圖如下所示：

需求：

1. 綠色區域要求在圖片上方，半透明顯示

2. 當鼠標移動到紅色區域，切換相應的圖片

3. 首頁的三張大圖輪轉

HTML：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 <div id="carousel"> <div id="carouselimg" class="content_top"> <div id="imgcontainer" class="slide_panel"> <a target="_blank" href="http://www.baidu.com" mce_href="http://www.baidu.com"><img src="images/brandshop/band_lx_717x280.gif" mce_src="images/brandshop/band_lx_717x280.gif"/></a> <a target="_blank" href="http://www.google.com" mce_href="http://www.google.com"><img src="images/brandshop/band_agz_717x280.gif" mce_src="images/brandshop/band_agz_717x280.gif"/></a> <a target="_blank" href="http://www.dangdang.com" mce_href="http://www.dangdang.com"><img src="images/brandshop/band_qb_717x280.gif" mce_src="images/brandshop/band_qb_717x280.gif"/></a> </div> </div> <div id="carouseltitle"> <ul> <li> <a href="#" mce_href="#">聯想 <span>lenovo</span></a> </li> <li> <a href="#" mce_href="#">愛國者 <span>aigo</span></a> </li> <li> <a href="#" mce_href="#">倩碧 <span>CLINIQUE</span></a> </li> </ul> </div>

CSS：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 <mce:style type="text/css"><!-- *{ padding:0; margin:0; } #carousel{ border-color:#DFDFDF;border-style:solid;border-width:0 1px 1px; position:relative;/*DO NOT delete this line*/ } #carousel ul{ list-style:none; } #carousel #carouselimg{ position:relative;/*fix ie7 overflow bug*/ overflow:hidden; } #carousel #carouselimg #imgcontainer{ position:absolute; left:0px; top:0px; } #carousel #carouselimg img{ float:left;/*fix ie6 auto-margin bug*/ border:0; /*display:none;*/ } #carousel #carouseltitle{ position:absolute; bottom:0px; } #carousel #carouseltitle ul{ } #carousel #carouseltitle li{ width:239px; height:30px; line-height:30px; font-size:14px; text-align:center; background:#000; color:#FFF; float:left; cursor:pointer; opacity:.6; filter:alpha(opacity=60); } #carousel #carouseltitle .active{ background:#cfaf73; color:#FFF; opacity:.9; filter:alpha(opacity=90); } #carousel #carouseltitle .active a{ color:#000; } #carousel #carouseltitle li a{ text-decoration:none; color:#fff; } #carousel #carouseltitle li a span{ font-family:Arial; } --></mce:style><style type="text/css" mce_bogus="1"> *{ padding:0; margin:0; } #carousel{ border-color:#DFDFDF;border-style:solid;border-width:0 1px 1px; position:relative;/*DO NOT delete this line*/ } #carousel ul{ list-style:none; } #carousel #carouselimg{ position:relative;/*fix ie7 overflow bug*/ overflow:hidden; } #carousel #carouselimg #imgcontainer{ position:absolute; left:0px; top:0px; } #carousel #carouselimg img{ float:left;/*fix ie6 auto-margin bug*/ border:0; /*display:none;*/ } #carousel #carouseltitle{ position:absolute; bottom:0px; } #carousel #carouseltitle ul{ } #carousel #carouseltitle li{ width:239px; height:30px; line-height:30px; font-size:14px; text-align:center; background:#000; color:#FFF; float:left; cursor:pointer; opacity:.6; filter:alpha(opacity=60); } #carousel #carouseltitle .active{ background:#cfaf73; color:#FFF; opacity:.9; filter:alpha(opacity=90); } #carousel #carouseltitle .active a{ color:#000; } #carousel #carouseltitle li a{ text-decoration:none; color:#fff; } #carousel #carouseltitle li a span{ font-family:Arial; } </style>

引入River Zhang 的fr.carousel.js

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 FR={ Version:'1.0.0', Author:'River Zhang(zhang_hechuan@hotmail.com)', Lisence:'MIT Lisence' }; FR.Util={ //Replace document.getElementById. $:function(id){ return document.getElementById(id); }, //Replace getElementsByTagName. $$:function(node, tag){ return node.getElementsByTagName(tag); }, creat:function(node,name){ var element=document.createElement(name); node.appendChild(element); return element; }, //Event Binding functions. addEvent:function(eventType,eventFunc,eventObj){ eventObj = eventObj || document; if(window.attachEvent)eventObj.attachEvent("on"+eventType,eventFunc); if(window.addEventListener) eventObj.addEventListener(eventType,eventFunc,false); }, setOpacity:function(obj, value) { if (document.all) obj.style.filter = "alpha(opacity=" + value + ")"; else obj.style.opacity = value / 100; }, setPosition:function(obj, x, y){ var curx=parseInt(obj.style.left); var cury=parseInt(obj.style.top); if(isNaN(curx)) curx=cury=0; var newx=curx+x; var newy=cury+y; obj.style.left=newx+'px'; obj.style.top=newy+'px'; } }; FR.Carousel={ version:'1.1', mode:1, steps:20, period:25, width:300, height:200, bgColor:'#000000', autoSwitch:true, delay:5000, _semaphore:0,/* DO NOT try to modify this value */ start:function(args){ if(typeof(args)!='undefined'){ FR.Carousel.mode=args.mode||FR.Carousel.mode; FR.Carousel.steps=args.steps||FR.Carousel.steps; FR.Carousel.period=args.period||FR.Carousel.period; FR.Carousel.width=args.width||FR.Carousel.width; FR.Carousel.height=args.height||FR.Carousel.height; FR.Carousel.bgColor=args.bgColor||FR.Carousel.bgColor; FR.Carousel.autoSwitch=args.autoSwitch||FR.Carousel.autoSwitch; FR.Carousel.delay=args.delay||FR.Carousel.delay; } FR.Util.addEvent("load",FR.Carousel.run,window); }, run:function(){ FR.Carousel.initialCSS(); FR.Carousel.counter='frimg0'; var carouselimg=FR.Util.$('carouselimg'); var img=FR.Util.$$(carouselimg, 'img'); for(var i=0;i!=img.length;++i){ img[i].id='frimg'+i; if(FR.Carousel.mode==4 || FR.Carousel.mode==5) continue; img[i].style.position="absolute"; img[i].style.left="0 px"; img[i].style.top="0 px"; FR.Util.setOpacity(img[i], 0); } if(FR.Carousel.mode!=4) FR.Util.setOpacity(img[0], 100); if(FR.Carousel.mode==1) bindFunction=function(name){FR.Carousel.fade(FR.Util.$(name), FR.Carousel.steps, FR.Carousel.period);}; else if(FR.Carousel.mode==2) bindFunction=function(name){FR.Carousel.flash(FR.Util.$(name), FR.Carousel.steps, FR.Carousel.period);}; else if(FR.Carousel.mode==3) bindFunction=function(name){FR.Carousel.fadeIntoColor(FR.Util.$(name), FR.Carousel.steps, FR.Carousel.period);}; else if(FR.Carousel.mode==4) bindFunction=function(name){FR.Carousel.scroll(name, FR.Carousel.steps, FR.Carousel.period);}; else if(FR.Carousel.mode==5) bindFunction=function(name){FR.Carousel.crawl(name, FR.Carousel.steps, FR.Carousel.period);}; var carouseltitle=FR.Util.$('carouseltitle'); var li=FR.Util.$$(carouseltitle, 'li'); li[0].className='#carousel #carouseltitle active'; FR.Carousel.autoCarousel(img.length); for(var i=0;i!=li.length;++i){ (function(){ var name='frimg'+i; li[i].onmouseover=function(){ clearInterval(FR.Carousel.s); if(!FR.Carousel._semaphore){ li[FR.Carousel.counter.split('')[FR.Carousel.counter.length-1]].className=''; this.className='#carousel #carouseltitle active'; bindFunction(name); } }; li[i].onmouseout=function(){ FR.Carousel.autoCarousel(img.length); } })(); } }, autoCarousel:function(length){ if(FR.Carousel.autoSwitch){ FR.Carousel.s=setInterval(function(){ var carouseltitle=FR.Util.$('carouseltitle'); var li=FR.Util.$$(carouseltitle, 'li'); li[FR.Carousel.counter.split('')[FR.Carousel.counter.length-1]].className=''; var next=(parseInt(FR.Carousel.counter.split('')[FR.Carousel.counter.length-1])+1)%length; li[next].className='#carousel #carouseltitle active'; name='frimg'+next; bindFunction(name); },FR.Carousel.delay); } }, initialCSS:function(){ var carouselimg=FR.Util.$('carouselimg'); var carousel=FR.Util.$('carousel'); carouselimg.style.width=FR.Carousel.width+"px"; carouselimg.style.height=FR.Carousel.height+"px"; carousel.style.width=FR.Carousel.width+"px"; carousel.style.height=FR.Carousel.height+"px"; if(FR.Carousel.mode==5){ var imgcontainer=FR.Util.$('imgcontainer'); var img=FR.Util.$$(carouselimg, 'img'); var size=img.length*FR.Carousel.width; imgcontainer.style.width=size+"px"; } }, fade:function(obj, steps, speed) { FR.Carousel._semaphore=1; var value1=0; var value2=100; if(obj.id!=FR.Carousel.counter){ var carouselimg=FR.Util.$('carouselimg'); var img=FR.Util.$$(carouselimg, 'img'); for(var i=0;i!=img.length;++i){ if(i!=FR.Carousel.counter.split('')[FR.Carousel.counter.length-1]) FR.Util.setOpacity(img[i], 0); } temp=FR.Carousel.counter; FR.Carousel.counter=obj.id; tempobj=FR.Util.$(temp); var increment=100/steps; FR.Carousel.i=setInterval(function(){ if(value1<=100){ FR.Util.setOpacity(obj,value1); FR.Util.setOpacity(tempobj,value2); value1+=increment; value2-=increment; } else { clearInterval(FR.Carousel.i); FR.Carousel._semaphore=0; } },speed); }else { FR.Carousel._semaphore=0; return; } }, flash:function(obj, steps, speed) { FR.Carousel._semaphore=1; var value1=0; if(obj.id!=FR.Carousel.counter){ var carouselimg=FR.Util.$('carouselimg'); var img=FR.Util.$$(carouselimg, 'img'); for(var i=0;i!=img.length;++i){ FR.Util.setOpacity(img[i], 0); } FR.Carousel.counter=obj.id; var increment=100/steps; FR.Carousel.i=setInterval(function(){ if(value1<=100){ FR.Util.setOpacity(obj,value1); value1+=increment; } else { clearInterval(FR.Carousel.i); FR.Carousel._semaphore=0; } },speed); }else { FR.Carousel._semaphore=0; return; } }, fadeIntoColor:function(obj, steps, speed){ FR.Carousel._semaphore=1; var value1=100; var value2=0; if(obj.id!=FR.Carousel.counter){ var carouselimg=FR.Util.$('carouselimg'); carouselimg.style.backgroundColor=FR.Carousel.bgColor; var img=FR.Util.$$(carouselimg, 'img'); for(var i=0;i!=img.length;++i){ if(i!=FR.Carousel.counter.split('')[FR.Carousel.counter.length-1]) FR.Util.setOpacity(img[i], 0); } temp=FR.Carousel.counter; FR.Carousel.counter=obj.id; tempobj=FR.Util.$(temp); var increment=100/steps; FR.Carousel.i=setInterval(function(){ if(value1>=0){ FR.Util.setOpacity(tempobj,value1); value1-=increment; } else if(value1<0 && value2<=100){ FR.Util.setOpacity(obj,value2); value2+=increment; } else { clearInterval(FR.Carousel.i); FR.Carousel._semaphore=0; } },speed); } else { FR.Carousel._semaphore=0; return; } }, scroll:function(curno, steps, speed){ FR.Carousel._semaphore=1; var ic=FR.Util.$('imgcontainer'); var count=(curno.split('')[curno.length-1]-FR.Carousel.counter.split('')[FR.Carousel.counter.length-1])*FR.Carousel.height; FR.Carousel.counter=curno; var value1=0; var increment=count/steps; FR.Carousel.i=setInterval(function(){ if(Math.abs(value1)<Math.abs(count)){ if(count>0){ FR.Util.setPosition(ic,0,-increment); value1-=increment; } else{ FR.Util.setPosition(ic,0,-increment); value1+=increment; } } else { clearInterval(FR.Carousel.i); FR.Carousel._semaphore=0; } },speed); }, crawl:function(curno, steps, speed){ FR.Carousel._semaphore=1; var ic=FR.Util.$('imgcontainer'); var count=(curno.split('')[curno.length-1]-FR.Carousel.counter.split('')[FR.Carousel.counter.length-1])*FR.Carousel.width; FR.Carousel.counter=curno; var value1=0; var increment=count/steps; FR.Carousel.i=setInterval(function(){ if(Math.abs(value1)<Math.abs(count)){ if(count>0){ FR.Util.setPosition(ic,-increment,0); value1-=increment; } else{ FR.Util.setPosition(ic,-increment,0); value1+=increment; } } else { clearInterval(FR.Carousel.i); FR.Carousel._semaphore=0; } },speed); } };

可以實現圖片的輪轉效果，但是點擊圖片後，每次鏈接跳轉都是最後一張圖的a href

查看fr.carousel.js ，原來，它實現的思路是將三張圖一張疊在一張上邊，使用setInterval() ,將一張圖的opacity 值置為1，其余兩張為0。但是，這將導致你點擊圖片後，每次的鏈接都是最上邊的那張圖(即最後倩碧那一張)。

解決方法：

設置輪轉圖的 z-index，當圖片顯示的時候，其父節點<a> 的z-index 比其它元素高。

jQuery實現：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 // 判斷img輪轉，實現a跳轉 setInterval(function(){ $("#imgcontainer a").each(function(i){ var img = $(this).children("img"); var op = img.css("opacity"); if(op>0){ img.css("z-index","100"); $(this).css("z-index","100"); }else{ img.css("z-index","0"); $(this).css("z-index","0"); } }) },100);