透明往往能產生不錯的網頁視覺效果，先奉上相容主流瀏覽器的CSS透明程式碼:

CSS

123456

.transparent_class {filter:alpha(opacity=50);-moz-opacity:0.5;-khtml-opacity:0.5;opacity:0.5;}

上面的幾個屬性分別是:
opacity: 0.5; 這是最重要的，因為它是CSS標準.該屬性支援Firefox, Safari和 Opera.
filter:alpha(opacity=50); 這個是為IE6設的，可取值在0-100，其它三個0到1.
-moz-opacity:0.5; 這個是為了支援一些老版本的Mozilla瀏覽器。
-khtml-opacity: 0.5; 這個為了支援一些老版本的Safari瀏覽器。
CSS透明度繼承問題
但CSS的透明屬性涉及到一個繼承問題，當為父級元素設定透明度後，子元素將自動繼承其透明度，即使你又為子元素指定透明度為1也是無效的。
對於子元素是文字的情況，我的解決方法一般是如果多少還能夠看清，就不管。另一個折衷的方法是，為文字子元素指定一個相對更深的顏色。也就是說，當子元素繼承透明度後，所得到的文字顏色正好就是你想要的。前提是，這個顏色還有加深的可能，和需要詳細的計算顏色和透明度的值。
還有”取消透明度繼承”的說法，這個說法是不太準確的，據我個人所知，沒有任何取消透明度繼承的方法。只能說，當想要實現”多個元素覆蓋，只讓指定的元素透明”時，可以使用的一些Hack。
搜了一下，找到一個不錯的實現這種效果的方法 – 一個關於透明繼承度的問題，有興趣的朋友可以看看。原理很簡單，新增一個空元素作為透明層，和不想透明但是要實現覆蓋效果的元素為同級元素。父級元素使用position:relative定位; 兩個子元素使用position:absolute定位，實現覆蓋。
html程式碼：

1 2 3

<div class="div3"><div class="div4"></div>這裡文字圖片都沒透明度了 <div class="div2">圖片</div> </div>

CSS程式碼

1 2 3 4 5 6 7

body { background-image:url(./105247.png); background-repeat:repeat; } .div2{width:100px;height:100px;background:url(./testbok.png)} .div3{width:200px;height:200px;position:relative;margin-top:10px} .div4{position:absolute;top:0;height:200px;width:200px;z-index:-1;background:#FFFFFF;filter:alpha(opacity=70);opacity:0.7;}

http://www.rs66.com/member/index.php?uid=88ekq5rk
http://www.rs66.com/member/index.php?uid=uc3flejk
http://www.rs66.com/member/index.php?uid=o49l1q25
http://www.rs66.com/member/index.php?uid=2719cyxc
http://www.rs66.com/member/index.php?uid=ug6147jl
http://www.rs66.com/member/index.php?uid=00es6hcu
http://www.rs66.com/member/index.php?uid=6b1mnuc0
http://www.rs66.com/member/index.php?uid=1hr3tr4u
http://www.rs66.com/member/index.php?uid=ojm0facd
http://www.rs66.com/member/index.php?uid=9hcohp3q
http://www.rs66.com/member/index.php?uid=3wps68kk
http://www.rs66.com/member/index.php?uid=hj6lvy65
http://www.rs66.com/member/index.php?uid=odbq5ib7
http://www.rs66.com/member/index.php?uid=0r74m36y
http://www.rs66.com/member/index.php?uid=q5tzgbb6
http://www.rs66.com/member/index.php?uid=ktb6ds0v
http://www.rs66.com/member/index.php?uid=kj4p539e
http://www.rs66.com/member/index.php?uid=tqzx58it
http://www.rs66.com/member/index.php?uid=l37hjyyt
http://www.rs66.com/member/index.php?uid=nt6h47yh
http://www.rs66.com/member/index.php?uid=3vt05v96
http://www.rs66.com/member/index.php?uid=61w7qaq2
http://www.rs66.com/member/index.php?uid=5st2a9p0
http://www.rs66.com/member/index.php?uid=g5wtxcor
http://www.rs66.com/member/index.php?uid=g38tafm4
http://www.rs66.com/member/index.php?uid=lzxtltvi
http://www.rs66.com/member/index.php?uid=jznohq42
http://www.rs66.com/member/index.php?uid=yg8u94sl
http://www.rs66.com/member/index.php?uid=rq178377
http://www.rs66.com/member/index.php?uid=k9zz8lmm
http://www.rs66.com/member/index.php?uid=mps4lkw2
http://www.rs66.com/member/index.php?uid=fol3s92z
http://www.rs66.com/member/index.php?uid=s7sosldp
http://www.rs66.com/member/index.php?uid=44e0xr8c
http://www.rs66.com/member/index.php?uid=9hjcpv0a
http://www.rs66.com/member/index.php?uid=h5cxspwk
http://www.rs66.com/member/index.php?uid=bjyi6e2f
http://www.rs66.com/member/index.php?uid=nqu5nnpd
http://www.rs66.com/member/index.php?uid=94oyqte1
http://www.rs66.com/member/index.php?uid=hm105nom
http://www.rs66.com/member/index.php?uid=8038pz8k
http://www.rs66.com/member/index.php?uid=8e6vw3oy
http://www.rs66.com/member/index.php?uid=wqzd75l1
http://www.rs66.com/member/index.php?uid=8jtk6ih1
http://www.rs66.com/member/index.php?uid=oxfdm2d4
http://www.rs66.com/member/index.php?uid=u3s27w1c
http://www.rs66.com/member/index.php?uid=64osd22o
http://www.rs66.com/member/index.php?uid=37sdjoly
http://www.rs66.com/member/index.php?uid=g8ibpb3k
http://www.rs66.com/member/index.php?uid=nl3oywve
http://www.rs66.com/member/index.php?uid=lm1df5jr
http://www.rs66.com/member/index.php?uid=jo48fm0d
http://www.rs66.com/member/index.php?uid=26o2ys80
http://www.rs66.com/member/index.php?uid=pod8u9mg
http://www.rs66.com/member/index.php?uid=ybb0n8hj
http://www.rs66.com/member/index.php?uid=4rnyrjsw
http://www.rs66.com/member/index.php?uid=sn74y9uh
http://www.rs66.com/member/index.php?uid=ecjmx7op
http://www.rs66.com/member/index.php?uid=x80n0xy0
http://www.rs66.com/member/index.php?uid=93ir6567
http://www.rs66.com/member/index.php?uid=jp5vyva9
http://www.rs66.com/member/index.php?uid=oi97tmu1
http://www.rs66.com/member/index.php?uid=hvl4m5es
http://www.rs66.com/member/index.php?uid=uec8uqge
http://www.rs66.com/member/index.php?uid=t2lgsiuj
http://www.rs66.com/member/index.php?uid=d7x9e6ff
http://www.rs66.com/member/index.php?uid=qo84jd43
http://www.rs66.com/member/index.php?uid=j1ac4d3y
http://www.rs66.com/member/index.php?uid=99lpw2ii
http://www.rs66.com/member/index.php?uid=vaxlc4lv
http://www.rs66.com/member/index.php?uid=y3j62o9y
http://www.rs66.com/member/index.php?uid=47gfasle
http://www.rs66.com/member/index.php?uid=c8w5m5rk
http://www.rs66.com/member/index.php?uid=us8r5mky
http://www.rs66.com/member/index.php?uid=0c4wchc7
http://www.rs66.com/member/index.php?uid=4em3liju
http://www.rs66.com/member/index.php?uid=mq3l2mu5
http://www.rs66.com/member/index.php?uid=99ookd72
http://www.rs66.com/member/index.php?uid=u7e995x8
http://www.rs66.com/member/index.php?uid=80f3ag7o
http://www.rs66.com/member/index.php?uid=c8fy31dc
http://www.rs66.com/member/index.php?uid=qe24is70
http://www.rs66.com/member/index.php?uid=3ke2wm14
http://www.rs66.com/member/index.php?uid=th1rzlwp
http://www.rs66.com/member/index.php?uid=qe24ia3w
http://www.rs66.com/member/index.php?uid=lg8oabuo
http://www.rs66.com/member/index.php?uid=pscsdr2u
http://www.rs66.com/member/index.php?uid=ehau4tjn
http://www.rs66.com/member/index.php?uid=w55pg3ji
http://www.rs66.com/member/index.php?uid=amwp1h0w
http://www.rs66.com/member/index.php?uid=0qi00348
http://www.rs66.com/member/index.php?uid=zsha3no6
http://www.rs66.com/member/index.php?uid=uhgupvj0
http://www.rs66.com/member/index.php?uid=f4ywop55
http://www.rs66.com/member/index.php?uid=fff1fmy0
http://www.rs66.com/member/index.php?uid=22y0s4c2
http://www.rs66.com/member/index.php?uid=ibougrvz
http://www.rs66.com/member/index.php?uid=rnts9v5k
http://www.rs66.com/member/index.php?uid=yy6ziqol
http://www.rs66.com/member/index.php?uid=uy1ua728
http://www.rs66.com/member/index.php?uid=vb5a3tl4
http://www.rs66.com/member/index.php?uid=ui4gpa9n
http://www.rs66.com/member/index.php?uid=92ukvkw3
http://www.rs66.com/member/index.php?uid=sdyr4sr9
http://www.rs66.com/member/index.php?uid=467shreh
http://www.rs66.com/member/index.php?uid=gbjl2pcr
http://www.rs66.com/member/index.php?uid=dm6ypo9y
http://www.rs66.com/member/index.php?uid=1hclt7a7
http://www.rs66.com/member/index.php?uid=ylwe5n72
http://www.rs66.com/member/index.php?uid=dokb2mdf
http://www.rs66.com/member/index.php?uid=j3h6dtk2
http://www.rs66.com/member/index.php?uid=lk7h815i
http://www.rs66.com/member/index.php?uid=y0kd4fsd
http://www.rs66.com/member/index.php?uid=wam6fl57
http://www.rs66.com/member/index.php?uid=s6dfy6a6
http://www.rs66.com/member/index.php?uid=3ot4e7k3
http://www.rs66.com/member/index.php?uid=6g5udxbv
http://www.rs66.com/member/index.php?uid=n2abznz2
http://www.rs66.com/member/index.php?uid=02xo5kmg
http://www.rs66.com/member/index.php?uid=2yy09e1r
http://www.rs66.com/member/index.php?uid=fpo9sb5d
http://www.rs66.com/member/index.php?uid=v6kmernr
http://www.rs66.com/member/index.php?uid=dqjgx5is
http://www.rs66.com/member/index.php?uid=wjxwjf2i
http://www.rs66.com/member/index.php?uid=b6zof8x5
http://www.rs66.com/member/index.php?uid=71we610p
http://www.rs66.com/member/index.php?uid=61h559l6
http://www.rs66.com/member/index.php?uid=q8e5trt7
http://www.rs66.com/member/index.php?uid=8vyggmun
http://www.rs66.com/member/index.php?uid=lzbzhux3
http://www.rs66.com/member/index.php?uid=4bgtl20n
http://www.rs66.com/member/index.php?uid=0c14t3s1
http://www.rs66.com/member/index.php?uid=fkipbpxy
http://www.rs66.com/member/index.php?uid=ph3ebert
http://www.rs66.com/member/index.php?uid=j1wge6nt
http://www.rs66.com/member/index.php?uid=o7nwat0c
http://www.rs66.com/member/index.php?uid=f9rr4c3w
http://www.rs66.com/member/index.php?uid=xljp6d9w
http://www.rs66.com/member/index.php?uid=j7xae1cy
http://www.rs66.com/member/index.php?uid=i76cnp7a
http://www.rs66.com/member/index.php?uid=ojow7k7u
http://www.rs66.com/member/index.php?uid=xmo9ugp8
http://www.rs66.com/member/index.php?uid=d4b70dil
http://www.rs66.com/member/index.php?uid=un419gp7
http://www.rs66.com/member/index.php?uid=570yb9db
http://www.rs66.com/member/index.php?uid=etcood10
http://www.rs66.com/member/index.php?uid=s29d7r7h
http://www.rs66.com/member/index.php?uid=esqob2s9
http://www.rs66.com/member/index.php?uid=cwh71198
http://www.rs66.com/member/index.php?uid=1qdefypd
http://www.rs66.com/member/index.php?uid=4zn0k1cc
http://www.rs66.com/member/index.php?uid=1nttl8ul
http://www.rs66.com/member/index.php?uid=1147iye1
http://www.rs66.com/member/index.php?uid=ysp1y45f
http://www.rs66.com/member/index.php?uid=yk18aayy
http://www.rs66.com/member/index.php?uid=928qmq07
http://www.rs66.com/member/index.php?uid=bk1t84gz
http://www.rs66.com/member/index.php?uid=6x2m05r4
http://www.rs66.com/member/index.php?uid=cm46nqx4
http://www.rs66.com/member/index.php?uid=zdtampm9
http://www.rs66.com/member/index.php?uid=u2yrjrbw
http://www.rs66.com/member/index.php?uid=80f2wy0e
http://www.rs66.com/member/index.php?uid=4aqtwqlq
http://www.rs66.com/member/index.php?uid=m41i6tvu
http://www.rs66.com/member/index.php?uid=6i1weh3w
http://www.rs66.com/member/index.php?uid=h7c3uy2w
http://www.rs66.com/member/index.php?uid=ehnv2f1v
http://www.rs66.com/member/index.php?uid=cg98uf4f
http://www.rs66.com/member/index.php?uid=h7qc9iqx
http://www.rs66.com/member/index.php?uid=l883n10c
http://www.rs66.com/member/index.php?uid=l7ux8f3p
http://www.rs66.com/member/index.php?uid=13cuwtzq
http://www.rs66.com/member/index.php?uid=ax7h5oo0
http://www.rs66.com/member/index.php?uid=6m07lblp
http://www.rs66.com/member/index.php?uid=h6o731ei
http://www.rs66.com/member/index.php?uid=ytlg3fob
http://www.rs66.com/member/index.php?uid=3o7luw6y
http://www.rs66.com/member/index.php?uid=b7qwdvce
http://www.rs66.com/member/index.php?uid=izg3nsvi
http://www.rs66.com/member/index.php?uid=kazu401x
http://www.rs66.com/member/index.php?uid=8k6mb2dq
http://www.rs66.com/member/index.php?uid=wvxge9l8
http://www.rs66.com/member/index.php?uid=68mdl5l1
http://www.rs66.com/member/index.php?uid=xy3idrey
http://www.rs66.com/member/index.php?uid=ft1m69e5
http://www.rs66.com/member/index.php?uid=mp7xgxe5
http://www.rs66.com/member/index.php?uid=nrvsh004
http://www.rs66.com/member/index.php?uid=pmzdcolw
http://www.rs66.com/member/index.php?uid=5t945ze6
http://www.rs66.com/member/index.php?uid=c27t3bgj
http://www.rs66.com/member/index.php?uid=pjfbc1ar
http://www.rs66.com/member/index.php?uid=u0hc14wt
http://www.rs66.com/member/index.php?uid=sgnig1pb
http://www.rs66.com/member/index.php?uid=c4hpnfyg
http://www.rs66.com/member/index.php?uid=78t1xtu0
http://www.rs66.com/member/index.php?uid=0m64oby6
http://www.rs66.com/member/index.php?uid=080bsexs
http://www.rs66.com/member/index.php?uid=luu9uvph
http://www.rs66.com/member/index.php?uid=31a3tab4
http://www.rs66.com/member/index.php?uid=ojtmkzsp
http://www.rs66.com/member/index.php?uid=ghq6ka9x
http://www.rs66.com/member/index.php?uid=enf1bwtc
http://www.rs66.com/member/index.php?uid=3xsse27m
http://www.rs66.com/member/index.php?uid=mpdsce63
http://www.rs66.com/member/index.php?uid=4bbcl3oi
http://www.rs66.com/member/index.php?uid=uww1fjcp
http://www.rs66.com/member/index.php?uid=2ux2pde2
http://www.rs66.com/member/index.php?uid=s1fb8zin
http://www.rs66.com/member/index.php?uid=77s0q1jc
http://www.rs66.com/member/index.php?uid=xzv5s3d7
http://www.rs66.com/member/index.php?uid=etwj4y61
http://www.rs66.com/member/index.php?uid=0g17zkbh
http://www.rs66.com/member/index.php?uid=jt524vnb
http://www.rs66.com/member/index.php?uid=zg6gh6nj
http://www.rs66.com/member/index.php?uid=couq7ped
http://www.rs66.com/member/index.php?uid=vh3gotvz
http://www.rs66.com/member/index.php?uid=cwpt216p
http://www.rs66.com/member/index.php?uid=x72z41eu
http://www.rs66.com/member/index.php?uid=p5ybdty2
http://www.rs66.com/member/index.php?uid=788fw2zy
http://www.rs66.com/member/index.php?uid=y797dn45
http://www.rs66.com/member/index.php?uid=qega2499
http://www.rs66.com/member/index.php?uid=2riq9i2u
http://www.rs66.com/member/index.php?uid=n4r1xs8r
http://www.rs66.com/member/index.php?uid=9ztb54q8
http://www.rs66.com/member/index.php?uid=qp8tmc9e
http://www.rs66.com/member/index.php?uid=5f4q6tlc
http://www.rs66.com/member/index.php?uid=2a0vy2b2
http://www.rs66.com/member/index.php?uid=8f0oq03l
http://www.rs66.com/member/index.php?uid=pnnosm3c
http://www.rs66.com/member/index.php?uid=icx381te
http://www.rs66.com/member/index.php?uid=p03vd60k
http://www.rs66.com/member/index.php?uid=rkm8r82k
http://www.rs66.com/member/index.php?uid=8zhlrygh
http://www.rs66.com/member/index.php?uid=54sx5qxj
http://www.rs66.com/member/index.php?uid=z2z5gylz
http://www.rs66.com/member/index.php?uid=7ztb9dn3
http://www.rs66.com/member/index.php?uid=xe6o6puf
http://www.rs66.com/member/index.php?uid=p199jf4t
http://www.rs66.com/member/index.php?uid=qfig0mm4
http://www.rs66.com/member/index.php?uid=34nh69dv
http://www.rs66.com/member/index.php?uid=6c3efh5y
http://www.rs66.com/member/index.php?uid=4piq1g2d
http://www.rs66.com/member/index.php?uid=qu0ijrdy
http://www.rs66.com/member/index.php?uid=hf2y6y85
http://www.rs66.com/member/index.php?uid=2e77aarz
http://www.rs66.com/member/index.php?uid=vjsj2ry4
http://www.rs66.com/member/index.php?uid=a3lu55d3
http://www.rs66.com/member/index.php?uid=c1t8hrlz
http://www.rs66.com/member/index.php?uid=447f4pof
http://www.rs66.com/member/index.php?uid=jm9el7wr
http://www.rs66.com/member/index.php?uid=okhgzkjw
http://www.rs66.com/member/index.php?uid=4m3fgimk
http://www.rs66.com/member/index.php?uid=ecfig881
http://www.rs66.com/member/index.php?uid=nbphofwo
http://www.rs66.com/member/index.php?uid=789la5hc
http://www.rs66.com/member/index.php?uid=22hjzr29
http://www.rs66.com/member/index.php?uid=2dlsj20g
http://www.rs66.com/member/index.php?uid=m0fn8k4j
http://www.rs66.com/member/index.php?uid=5j32s5yn
http://www.rs66.com/member/index.php?uid=gj0imoqo
http://www.rs66.com/member/index.php?uid=kk63wx9d
http://www.rs66.com/member/index.php?uid=sq1j79jl
http://www.rs66.com/member/index.php?uid=pw6pft83
http://www.rs66.com/member/index.php?uid=jqr58r9j
http://www.rs66.com/member/index.php?uid=jnbtijtr
http://www.rs66.com/member/index.php?uid=m7t8fxs5
http://www.rs66.com/member/index.php?uid=4g756k5c
http://www.rs66.com/member/index.php?uid=l0vxac64
http://www.rs66.com/member/index.php?uid=jgsx9t8t
http://www.rs66.com/member/index.php?uid=kagjuvlo
http://www.rs66.com/member/index.php?uid=be7rb9m4
http://www.rs66.com/member/index.php?uid=2mpgzpwr
http://www.rs66.com/member/index.php?uid=n79u5r5k
http://www.rs66.com/member/index.php?uid=1o01fsbm
http://www.rs66.com/member/index.php?uid=7thqicvg
http://www.rs66.com/member/index.php?uid=2oxua6i2
http://www.rs66.com/member/index.php?uid=dcqxw0c0
http://www.rs66.com/member/index.php?uid=i9be47r5
http://www.rs66.com/member/index.php?uid=e3sv3y6b
http://www.rs66.com/member/index.php?uid=7yfwfmt0
http://www.rs66.com/member/index.php?uid=zdb119g8
http://www.rs66.com/member/index.php?uid=a8z7dply
http://www.rs66.com/member/index.php?uid=g1to771t
http://www.rs66.com/member/index.php?uid=77ib5v1t
http://www.rs66.com/member/index.php?uid=33ruawud
http://www.rs66.com/member/index.php?uid=9senh4yf
http://www.rs66.com/member/index.php?uid=vtrqazi6
http://www.rs66.com/member/index.php?uid=yo44iljj
http://www.rs66.com/member/index.php?uid=8kg6a2ta
http://www.rs66.com/member/index.php?uid=4enke3dw
http://www.rs66.com/member/index.php?uid=61xnox6p
http://www.rs66.com/member/index.php?uid=8i5ftaw7
http://www.rs66.com/member/index.php?uid=gvpzungf
http://www.rs66.com/member/index.php?uid=kokxj073
http://www.rs66.com/member/index.php?uid=f38w3qdo
http://www.rs66.com/member/index.php?uid=a4rjgax9
http://www.rs66.com/member/index.php?uid=rat8ktys
http://www.rs66.com/member/index.php?uid=h7e5llfh
http://www.rs66.com/member/index.php?uid=hqr6wbvq
http://www.rs66.com/member/index.php?uid=p50shapb
http://www.rs66.com/member/index.php?uid=6q0gm2wf
http://www.rs66.com/member/index.php?uid=ayj0j2sr
http://www.rs66.com/member/index.php?uid=ae2y7wzb
http://www.rs66.com/member/index.php?uid=zml52zj6
http://www.rs66.com/member/index.php?uid=5z1soh47
http://www.rs66.com/member/index.php?uid=2l1yyk68
http://www.rs66.com/member/index