 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>javascript控制Div層透明屬性,由淺變深逐漸顯示,由深變淺逐漸消失</title> 
<script> 
var SysIsIE; 
var ua = navigator.userAgent.toLowerCase(); 
var s;(s = ua.match(/msie ([\d.]+)/)) ? SysIsIE = s[1] : 0; 

function Q(s){ 
return document.getElementById(s); 
} 
function dvck(){ 
idstr='tian'; 
e=Q(idstr); 
if(e){ 
e.parentNode.removeChild(e); 
} 
var div=document.createElement("div"); 
div.style.position="absolute"; 
div.style.top='10%'; 
div.style.left='40%'; 
div.style.cssText='filter: alpha(opacity=10);opacity:0.1;position:absolute;top:50%;left:50%;width:544px;height:354px;margin-top:-177px;margin-left:-272px;;background-color:#000'; 
div.id=idstr; 
//div.innerHTML='<img src="i.jpg" onclick="cleand(\''+idstr+'\')" />'; 
div.innerHTML='<p style="color:#fff;text-align:center;">div層顯示的內(nèi)容,author：<a  style="color:#FBFC4D">bluid</a><br><br><br><br><br><a href="javascript:cleand(\''+idstr+'\')" style="color:#FEF8C3">關(guān)閉</a></p>'; 
document.body.appendChild(div); 
if (SysIsIE) 
dcbIE(idstr,'+'); 
else 
dcboth(idstr,'+'); 
} 
function dcbIE(s,j){ 
o=Q(s); 
opc=parseInt(o.filters.alpha.opacity); 
if(j=='+'){ 
if(opc<100){ 
o.filters.alpha.opacity=(opc+10)+''; 
setTimeout("dcbIE('"+s+"','"+j+"')",100); 
} 
}else if(j=='-'){ 
if(opc>0){ 
o.filters.alpha.opacity=(opc-10)+''; 
setTimeout("cleand('"+s+"','"+j+"')",100); 
} 
} 
} 
function dcboth(s,j){ 
o=Q(s); 
opc=parseFloat(o.style.opacity); 
if(j=='+'){ 
if(opc<1){ 
o.style.opacity=(opc+0.1)+''; 
//setInterval("dcboth('"+s+"')",3000); 
setTimeout("dcboth('"+s+"','"+j+"')",100); 
} 
}else if(j=='-'){ 
if(opc>0){ 
o.style.opacity=(opc-0.1)+''; 
setTimeout("cleand('"+s+"','"+j+"')",100); 
} 
} 
} 


function cleand(s){ 
if (SysIsIE){ 
dcbIE(s,'-'); 
}else{ 
dcboth(s,'-'); 
} 
} 
</script> 
</head> 
<body> 
<div><br><br> 
<p style="font-size:14px">javascript控制Div層透明屬性,由淺變深逐漸顯示,由深變淺逐漸消失.</p><br><br> 
<br><br><br> 
<p>單擊'click'顯示層,由淺變深逐漸顯示</p><br><br><br><br> 
<a href="javascript:dvck()">click</a><br><br><br><br> 
<p>在顯示的層上單擊,可以由深變淺逐漸消失</p> 
<br><br><br> 
<p> 
<!-- #BeginDate format:Am3m -->02/11/2011 16:17<!-- #EndDate --> --- author：<a >bluid</a> 
</p> 
<br><br><br><br> 
<br><br> 
</div> 
</body> 
</html> 