html隐藏顯示實作原理,怎麼實作一個div的隐藏與顯示(3)

HTML code

html,body{font-size:12px;margin:0px;height:100%;}

.mesWindow{border:#666 1px solid;background:#fff;}

.mesWindowTop{border-bottom:#eee 1px solid;margin-left:4px;padding:3px;font-weight:bold;text-align:left;font-size:12px;}

.mesWindowContent{margin:4px;font-size:12px;}

.mesWindow .close{height:15px;width:28px;border:none;cursor:pointer;text-decoration:underline;background:#fff}

var isIe=(document.all)?true:false;

//設定select的可見狀态

function setSelectState(state)

{

var objl=document.getElementsByTagName('select');

for(var i=0;i

{

objl[i].style.visibility=state;

}

}

function mousePosition(ev)

{

if(ev.pageX || ev.pageY)

{

return {x:ev.pageX, y:ev.pageY};

}

return {

x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,y:ev.clientY + document.body.scrollTop - document.body.clientTop

};

}

//彈出方法

function showMessageBox(wTitle,content,pos,wWidth)

{

closeWindow();

var bWidth=parseInt(document.documentElement.scrollWidth);

var bHeight=parseInt(document.documentElement.scrollHeight);

if(isIe){

setSelectState('hidden');}

var back=document.createElement("div");

back.id="back";

var styleStr="top:0px;left:0px;position:absolute;background:#666;width:"+bWidth+"px;height:"+bHeight+"px;";

styleStr+=(isIe)?"filter:alpha(opacity=40);":"opacity:0.40;";

back.style.cssText=styleStr;

document.body.appendChild(back);

var mesW=document.createElement("div");

mesW.id="mesWindow";

mesW.className="mesWindow";

mesW.innerHTML="

"+wTitle+"

"+content+"

styleStr="left:"+(((pos.x-wWidth)>0)?(pos.x-wWidth):pos.x)+"px;top:"+(pos.y)+"px;position:absolute;width:"+wWidth+"px;";

mesW.style.cssText=styleStr;

document.body.appendChild(mesW);

}

function showBackground(obj,endInt)

{

obj.filters.alpha.opacity+=1;

if(obj.filters.alpha.opacity

{

setTimeout(function(){showBackground(obj,endInt)},8);

}

}

//關閉視窗

function closeWindow()

{

if(document.getElementById('back')!=null)

{

document.getElementById('back').parentNode.removeChild(document.getElementById('back'));

}

if(document.getElementById('mesWindow')!=null)