같은 position에 있는 (꼭 같이 있을 필요는 되지만) 레이어를 투명도를 이용하여 부드럽게 교차시켜 줍니다.
소스가 상당히 노가다적입니다;
또 나름대로 주석을 달아놓긴 했는데, 말을 이해하기는 힘드실겁니다-_-;;
고쳐야 할 부분 알려주시면 감사하고, 필요하신 분들은 유용하게 쓰시기 바랍니다~
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<title>반투명하게 레이어 교차하기</title>
<pre class="scripts" lanugage="JavaScript">
var name = "layer"; //레이어의 이름.
var space = 1; //반투명 처리 간격.
var time1 = 0.1; //반투명도를 한간격 변경할 시간입니다. (초 단위)
var time2 = 2; //교차가 완료된 후 대기할 시간입니다. (초 단위)
var tran=1; //반투명도를 계산할 변수. (수정하는 것 아님)
var tranlr=1; //레이어1의 번호. (수정하는 것 아님)
function transparent() {
if(!document.getElementById(name+"1")) return; //레이어1이 없다면 그냥 함수를 끝낸다.
var tranlr2=tranlr+1; //교차할 그 다음의 레이어 (레이어2)
if(!document.getElementById(name+tranlr2)) tranlr2=1; //레이어2가 없다면 처음레이어로 돌아간다.
var preview = document.getElementById(name+tranlr);
var preview2 = document.getElementById(name+tranlr2);
if(preview2.style.opacity!="1") { //레이어2가 아직 반투명할 경우
preview2.style.display="block";
/* 여기부터는 Firefox의 방식 - style의 opacity가 1이면 불투명, 0이면 투명 */
var a=Math.round((tran - space*0.1)*10)/10; //레이어1의 변경될 투명도
var b=Math.round(Math.abs(a-1)*10)/10; //레이어2의 변경될 투명도. a에서 1을 뺀다음, 절대값.
preview.style.opacity=a;
preview2.style.opacity=b;
/* 여기부터는 IE의 방식 - filter:alpha가 opacity=100이면 불투명, 0이면 투명 */
a=tran*100 - space*10; //레이어1의 변경될 투명도
b=Math.abs(a - 100); //레이어2의 변경될 투명도. a에서 100을 뺀다음, 절대값.
preview.style.filter="alpha(opacity="+a+")";
preview2.style.filter="alpha(opacity="+b+")";
tran=tran - space*0.1;
setTimeout("transparent();", time1*1000);
} else { //레이어2가 완전히 보일 경우
preview.style.display="none";
tranlr++;
if(!document.getElementById(name+tranlr)) tranlr=1;
tran=1;
setTimeout("transparent();", time2*1000);
}
}
</pre>
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<div id="layer1" style="display:block;position:absolute;">안녕하세요. 미니위니 여러분!</div>
<div id="layer2" style="display:none;position:absolute;">반가워요~</div>
<div id="layer3" style="display:none;position:absolute;">사랑합니다!</div>
<div id="layer4" style="display:none;position:absolute;">알라뷰~♡</div>
<pre class="scripts" language="JavaScript">
//레이어 교차 함수 시작!
document.getElementById(name+"1").style.opacity=1;
document.getElementById(name+"1").style.filter="alpha(opacity=100)";
setTimeout("transparent();",time2*1000);
</pre>
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