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很多網(wǎng)友曾問(wèn)過(guò)這個(gè)效果，我做了一個(gè)小例子放在CSDN的博客里面,地址是：

http://download.csdn.net/user/chenpeng0118

if (typeof document.attachEvent!='undefined') {
window.attachEvent('onload',init);
document.attachEvent('onmousemove',moveMouse);
document.attachEvent('onclick',checkMove); }
else {
window.addEventListener('load',init,false);
document.addEventListener('mousemove',moveMouse,false);
document.addEventListener('click',checkMove,false);
}

var oDv=document.createElement("div");
var dvHdr=document.createElement("div");
var dvBdy=document.createElement("div");
var windowlock,boxMove,fixposx,fixposy,lockX,lockY,fixx,fixy,ox,oy,boxLeft,boxRight,boxTop,boxBottom,evt,mouseX,mouseY,boxOpen,totalScrollTop,totalScrollLeft;
boxOpen=false;
ox=10;
oy=10;
lockX=0;
lockY=0;

function init() {
oDv.appendChild(dvHdr);
oDv.appendChild(dvBdy);
oDv.style.position="absolute";
oDv.style.visibility='hidden';
document.body.appendChild(oDv);
}

function defHdrStyle() {
dvHdr.innerHTML='<img style="vertical-align:middle" src="info.gif">  '+dvHdr.innerHTML;
dvHdr.style.fontWeight='';
dvHdr.style.width='100px';
dvHdr.style.fontFamily='arial';
dvHdr.style.border='1px solid #A5CFE9';
dvHdr.style.padding='3';
dvHdr.style.fontSize='11';
dvHdr.style.color='#ffffff';
dvHdr.style.background='CadetBlue';
dvHdr.style.filter='alpha(opacity=85)'; // IE
dvHdr.style.opacity='0.85'; // FF
}

function defBdyStyle() {
dvBdy.style.borderBottom='1px solid #A5CFE9';
dvBdy.style.borderLeft='1px solid #A5CFE9';
dvBdy.style.borderRight='1px solid #A5CFE9';
dvBdy.style.width='100px';
dvBdy.style.fontFamily='arial';
dvBdy.style.fontSize='11';
dvBdy.style.padding='3';
dvBdy.style.color='#1B4966';
dvBdy.style.background='#FFFFFF';
dvBdy.style.filter='alpha(opacity=85)'; // IE
dvBdy.style.opacity='0.85'; // FF
}

function checkElemBO(txt) {
if (!txt || typeof(txt) != 'string') return false;
if ((txt.indexOf('header')>-1)&&(txt.indexOf('body')>-1)&&(txt.indexOf('[')>-1)&&(txt.indexOf('[')>-1))
return true;
else
return false;
}

function getParam(param,list) {
var reg = new RegExp('([^a-zA-Z]' + param + '|^' + param + ')//s*=//s*//[//s*((( //[//[)|(//]//])|([^//]//[]))*)//s*//]' );
var res = reg.exec(list);
var returnvar;
if(res)
return res[2].replace('[[','[').replace(']]',']');
else
return '';
}

function Left(elem){
var x=0;
if (elem.calcLeft)
return elem.calcLeft;
var oElem=elem;
while(elem){
if ((elem.currentStyle)&& (!isNaN(parseInt(elem.currentStyle.borderLeftWidth)))&&(x!=0))
x+=parseInt(elem.currentStyle.borderLeftWidth);
x+=elem.offsetLeft;
elem=elem.offsetParent;
}
oElem.calcLeft=x;
return x;
}

function Top(elem){
var x=0;
if (elem.calcTop)
return elem.calcTop;
var oElem=elem;
while(elem){
if ((elem.currentStyle)&& (!isNaN(parseInt(elem.currentStyle.borderTopWidth)))&&(x!=0))
x+=parseInt(elem.currentStyle.borderTopWidth);
x+=elem.offsetTop;
elem=elem.offsetParent;
}
oElem.calcTop=x;
return x;

}

var ah,ab;
function applyStyles() {
if(ab)
oDv.removeChild(dvBdy);
if (ah)
oDv.removeChild(dvHdr);
dvHdr=document.createElement("div");
dvBdy=document.createElement("div");
CBE.boCSSBDY?dvBdy.className=CBE.boCSSBDY:defBdyStyle();
CBE.boCSSHDR?dvHdr.className=CBE.boCSSHDR:defHdrStyle();
dvHdr.innerHTML=CBE.boHDR;
dvBdy.innerHTML=CBE.boBDY;
ah=false;
ab=false;
if (CBE.boHDR!='') {
oDv.appendChild(dvHdr);
ah=true;
}
if (CBE.boBDY!=''){
oDv.appendChild(dvBdy);
ab=true;
}
}

var CSE,iterElem,LSE,CBE,LBE, totalScrollLeft, totalScrollTop, width, height ;
var ini=false;

// Customised function for inner window dimension
function SHW() {
if (document.body && (document.body.clientWidth !=0)) {
width=document.body.clientWidth;
height=document.body.clientHeight;
}
if (document.documentElement && (document.documentElement.clientWidth!=0) && (document.body.clientWidth + 20 >= document.documentElement.clientWidth)) {
width=document.documentElement.clientWidth;
height=document.documentElement.clientHeight;
}
return [width,height];
}

function doCheck() {
if ( (mouseX < boxLeft) || (mouseX >boxRight) || (mouseY < boxTop) || (mouseY > boxBottom)) {
if (!CBE.requireclick)
fadeOut();
if (CBE.IEbugfix) {showSelects();}
CBE=null;
}
}

function pauseBox(e) {
e?evt=e:evt=event;
boxMove=false;
evt.cancelBubble=true;
}

function showHideBox(e) {
oDv.style.visibility=(oDv.style.visibility!='visible')?'visible':'hidden';
}

function hideBox(e) {
oDv.style.visibility='hidden';
}

var COL=0;
var stopfade=false;
function fadeIn(fs) {
ID=null;
COL=0;
oDv.style.visibility='visible';
fadeIn2(fs);
}

function fadeIn2(fs) {
COL=COL+fs;
COL=(COL>1)?1:COL;
oDv.style.filter='alpha(opacity='+parseInt(100*COL)+')';
oDv.style.opacity=COL;
if (COL<1)
setTimeout("fadeIn2("+fs+")",20);
}

function fadeOut() {
oDv.style.visibility='hidden';

}

function isChild(s,d) {
while(s) {
if (s==d)
return true;
s=s.parentNode;
}
return false;
}

var cSrc;
function checkMove(e) {
e?evt=e:evt=event;
cSrc=evt.target?evt.target:evt.srcElement;
if ((!boxMove)&&(!isChild(cSrc,oDv))) {
fadeOut();
if (CBE&&CBE.IEbugfix) {showSelects();}
boxMove=true;
CBE=null;
}
}

function showSelects(){
var elements = document.getElementsByTagName("select");
for (i=0;i< elements.length;i++){
elements[i].style.visibility='visible';
}
}

function hideSelects(){
var elements = document.getElementsByTagName("select");
for (i=0;i< elements.length;i++){
elements[i].style.visibility='hidden';
}
}

JS實(shí)現(xiàn)QQ空間打開(kāi)照片的效果源代碼

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