用js实现图片展开的效果
2011-03-28 13:58
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效果查看地址:http://www.anyou9.cn/
js 代码:
/* ==== slider nameSpace ==== */
var slider = function() {
/* ==== private methods ==== */
function getElementsByClass(object, tag, className) {
var o = object.getElementsByTagName(tag);
for ( var i = 0, n = o.length, ret = []; i < n; i++) {
if (o[i].className == className) ret.push(o[i]);
}
if (ret.length == 1) ret = ret[0];
return ret;
}
function setOpacity (obj,o) {
if (obj.filters) obj.filters.alpha.opacity = Math.round(o);
else obj.style.opacity = o / 100;
}
/* ==== Slider Constructor ==== */
function Slider(oCont, speed, iW, iH, oP) {
this.slides = [];
this.over = false;
this.S = this.S0 = speed;
this.iW = iW;
this.iH = iH;
this.oP = oP;
this.oc = document.getElementById(oCont);
this.frm = getElementsByClass(this.oc, 'div', 'slide');
this.NF = this.frm.length;
this.resize();
for (var i = 0; i < this.NF; i++) {
this.slides[i] = new Slide(this, i);
}
this.oc.parent = this;
this.view = this.slides[0];
this.Z = this.mx;
/* ==== on mouse out event ==== */
this.oc.onmouseout = function () {
this.parent.mouseout();
return false;
}
}
Slider.prototype = {
/* ==== animation loop ==== */
run : function () {
this.Z += this.over ? (this.mn - this.Z) * .5 : (this.mx - this.Z) * .5;
//this.view.calc();
var i = this.NF;
while (i--) this.slides[i].move();
},
/* ==== resize ==== */
resize : function () {
this.wh = this.oc.clientWidth*0.2;
this.ht = this.oc.clientHeight;
this.wr = this.wh * this.iW;
this.r = this.ht / this.wr;
this.mx = this.wh / this.NF;
this.mn = (this.wh*(1 - this.iW)) / (this.NF - 1);
},
/* ==== rest ==== */
mouseout : function () {
this.over = false;
//setOpacity(this.view.img, this.oP);
}
}
/* ==== Slide Constructor ==== */
Slide = function (parent, N) {
this.parent = parent;
this.N = N;
this.x0 = this.x1 = N * parent.mx;
this.v = 0;
this.loaded = false;
this.cpt = 0;
this.start = new Date();
this.obj = parent.frm
;
//this.txt = getElementsByClass(this.obj, 'div', 'text');
this.img = getElementsByClass(this.obj, 'img', 'diapo');
this.bkg = document.createElement('div');
this.bkg.className = 'backgroundText';
//this.obj.insertBefore(this.bkg, this.txt);
if (N == 0) this.obj.style.borderLeft = 'none';
this.obj.style.left = Math.floor(this.x0) + 'px';
//setOpacity(this.img, parent.oP);
/* ==== mouse events ==== */
this.obj.parent = this;
this.obj.onclick = function() {
this.parent.over();
return false;
//this.obj.onmouseover = function() {
//this.parent.over();
//return false;
}
}
Slide.prototype = {
/* ==== target positions ==== */
calc : function() {
var that = this.parent;
// left slides
for (var i = 0; i <= this.N; i++) {
that.slides[i].x1 = i * that.Z;
}
// right slides
for (var i = this.N + 1; i < that.NF; i++) {
that.slides[i].x1 = that.wh*5 - (that.NF - i) * that.Z;
}
},
/* ==== HTML animation : move slides ==== */
move : function() {
var that = this.parent;
var s =(this.x1 - this.x0) / that.S;
/* ==== lateral slide ==== */
if (this.N && Math.abs(s) > .5) {
this.obj.style.left = Math.floor(this.x0 += s) +'px';
}
/* ==== vertical text ==== */
var v = (this.N < that.NF - 1) ? that.slides[this.N + 1].x0 - this.x0 : that.wh - this.x0;
if (Math.abs(v - this.v) > .5) {
//this.bkg.style.top = this.txt.style.top = Math.floor(2 + that.ht - (v - that.Z) * that.iH * that.r) + 'px';
this.v = v;
this.cpt++;
} else {
if (!this.pro) {
/* ==== adjust speed ==== */
this.pro = true;
var tps = new Date() - this.start;
if(this.cpt > 1) {
that.S = Math.max(2, (28 / (tps / this.cpt)) * that.S0);
}
}
}
if (!this.loaded) {
if (this.img.complete) {
this.img.style.visibility = 'visible';
this.loaded = true;
}
}
},
/* ==== light ==== */
over : function () {
//this.parent.resize();
this.parent.over = true;
//setOpacity(this.parent.view.img, this.parent.oP);
this.parent.view = this;
this.start = new Date();
this.cpt = 0;
this.pro = false;
this.calc();
//setOpacity(this.img, 100);
}
}
/* ==== public method - script initialization ==== */
return {
init : function() {
// create instances of sliders here
// parameters : HTMLcontainer name, speed (2 fast - 20 slow), Horizontal ratio, vertical text ratio, opacity
this.s1 = new Slider("slider", 12, 1.84/3, 1/3.2, 70);
setInterval("slider.s1.run();", 16);
}
}
}();
function menuFix() {
var sfEls = document.getElementById("nav").getElementsByTagName("li");
for (var i=0; i<sfEls.length; i++) {
sfEls[i].onmouseover=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onMouseDown=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onMouseUp=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onmouseout=function() {
this.className=this.className.replace(new RegExp("( ?|^)sfhover//b"),
"");
}
}
}
window.onload=menuFix;
显示图片的js代码:
document.writeln(" <div id=/"slider/">");
document.writeln(" <div class=/"slide/"><img class=/"diapo/" src=/"/images/top6.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top5.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top4.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top3.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top2.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top1.jpg/" /></div>");
document.writeln("</div>");
js 代码:
/* ==== slider nameSpace ==== */
var slider = function() {
/* ==== private methods ==== */
function getElementsByClass(object, tag, className) {
var o = object.getElementsByTagName(tag);
for ( var i = 0, n = o.length, ret = []; i < n; i++) {
if (o[i].className == className) ret.push(o[i]);
}
if (ret.length == 1) ret = ret[0];
return ret;
}
function setOpacity (obj,o) {
if (obj.filters) obj.filters.alpha.opacity = Math.round(o);
else obj.style.opacity = o / 100;
}
/* ==== Slider Constructor ==== */
function Slider(oCont, speed, iW, iH, oP) {
this.slides = [];
this.over = false;
this.S = this.S0 = speed;
this.iW = iW;
this.iH = iH;
this.oP = oP;
this.oc = document.getElementById(oCont);
this.frm = getElementsByClass(this.oc, 'div', 'slide');
this.NF = this.frm.length;
this.resize();
for (var i = 0; i < this.NF; i++) {
this.slides[i] = new Slide(this, i);
}
this.oc.parent = this;
this.view = this.slides[0];
this.Z = this.mx;
/* ==== on mouse out event ==== */
this.oc.onmouseout = function () {
this.parent.mouseout();
return false;
}
}
Slider.prototype = {
/* ==== animation loop ==== */
run : function () {
this.Z += this.over ? (this.mn - this.Z) * .5 : (this.mx - this.Z) * .5;
//this.view.calc();
var i = this.NF;
while (i--) this.slides[i].move();
},
/* ==== resize ==== */
resize : function () {
this.wh = this.oc.clientWidth*0.2;
this.ht = this.oc.clientHeight;
this.wr = this.wh * this.iW;
this.r = this.ht / this.wr;
this.mx = this.wh / this.NF;
this.mn = (this.wh*(1 - this.iW)) / (this.NF - 1);
},
/* ==== rest ==== */
mouseout : function () {
this.over = false;
//setOpacity(this.view.img, this.oP);
}
}
/* ==== Slide Constructor ==== */
Slide = function (parent, N) {
this.parent = parent;
this.N = N;
this.x0 = this.x1 = N * parent.mx;
this.v = 0;
this.loaded = false;
this.cpt = 0;
this.start = new Date();
this.obj = parent.frm
;
//this.txt = getElementsByClass(this.obj, 'div', 'text');
this.img = getElementsByClass(this.obj, 'img', 'diapo');
this.bkg = document.createElement('div');
this.bkg.className = 'backgroundText';
//this.obj.insertBefore(this.bkg, this.txt);
if (N == 0) this.obj.style.borderLeft = 'none';
this.obj.style.left = Math.floor(this.x0) + 'px';
//setOpacity(this.img, parent.oP);
/* ==== mouse events ==== */
this.obj.parent = this;
this.obj.onclick = function() {
this.parent.over();
return false;
//this.obj.onmouseover = function() {
//this.parent.over();
//return false;
}
}
Slide.prototype = {
/* ==== target positions ==== */
calc : function() {
var that = this.parent;
// left slides
for (var i = 0; i <= this.N; i++) {
that.slides[i].x1 = i * that.Z;
}
// right slides
for (var i = this.N + 1; i < that.NF; i++) {
that.slides[i].x1 = that.wh*5 - (that.NF - i) * that.Z;
}
},
/* ==== HTML animation : move slides ==== */
move : function() {
var that = this.parent;
var s =(this.x1 - this.x0) / that.S;
/* ==== lateral slide ==== */
if (this.N && Math.abs(s) > .5) {
this.obj.style.left = Math.floor(this.x0 += s) +'px';
}
/* ==== vertical text ==== */
var v = (this.N < that.NF - 1) ? that.slides[this.N + 1].x0 - this.x0 : that.wh - this.x0;
if (Math.abs(v - this.v) > .5) {
//this.bkg.style.top = this.txt.style.top = Math.floor(2 + that.ht - (v - that.Z) * that.iH * that.r) + 'px';
this.v = v;
this.cpt++;
} else {
if (!this.pro) {
/* ==== adjust speed ==== */
this.pro = true;
var tps = new Date() - this.start;
if(this.cpt > 1) {
that.S = Math.max(2, (28 / (tps / this.cpt)) * that.S0);
}
}
}
if (!this.loaded) {
if (this.img.complete) {
this.img.style.visibility = 'visible';
this.loaded = true;
}
}
},
/* ==== light ==== */
over : function () {
//this.parent.resize();
this.parent.over = true;
//setOpacity(this.parent.view.img, this.parent.oP);
this.parent.view = this;
this.start = new Date();
this.cpt = 0;
this.pro = false;
this.calc();
//setOpacity(this.img, 100);
}
}
/* ==== public method - script initialization ==== */
return {
init : function() {
// create instances of sliders here
// parameters : HTMLcontainer name, speed (2 fast - 20 slow), Horizontal ratio, vertical text ratio, opacity
this.s1 = new Slider("slider", 12, 1.84/3, 1/3.2, 70);
setInterval("slider.s1.run();", 16);
}
}
}();
function menuFix() {
var sfEls = document.getElementById("nav").getElementsByTagName("li");
for (var i=0; i<sfEls.length; i++) {
sfEls[i].onmouseover=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onMouseDown=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onMouseUp=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onmouseout=function() {
this.className=this.className.replace(new RegExp("( ?|^)sfhover//b"),
"");
}
}
}
window.onload=menuFix;
显示图片的js代码:
document.writeln(" <div id=/"slider/">");
document.writeln(" <div class=/"slide/"><img class=/"diapo/" src=/"/images/top6.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top5.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top4.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top3.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top2.jpg/" /></div>");
document.writeln("<div class=/"slide/"><img class=/"diapo/" src=/"/images/top1.jpg/" /></div>");
document.writeln("</div>");
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