用滚动条来放大缩小图片,超酷

<!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>用滚动条来放大缩小图片</title>
<style type="text/css">

</style>
<script language="javascript" type="text/javascript">
//----------------------------------------------------------------------------------------------
// 功能说明：用于放大图片的滚动条，可放大至图片的原始大小。在ie6,ie7,ff1.5下可用
// 使用方法：在图片代码里加上resizeable=1，同时在onload事件里加上createResizeScroll函数
// code by: blues[2007-7-17]
//----------------------------------------------------------------------------------------------
//始初化变量
var oScroll=null,sScrollState=null,iScrollPos=0,iBrowser;
//------------------------------------------------------------------------------------------------
//页面初始化函数
//------------------------------------------------------------------------------------------------
function winInit(){
//检测浏览器类型
var __Agt = navigator.userAgent.toLowerCase();
var __If = /(firefox|netscape|opera).?[\/| ](.)\.([^;\)]+|[^\)]+\))$/.exec(__Agt);
if(!__If) __If = /(msie) (.)\.[^;]+;/.exec(__Agt);
var _Br=__If[1], _Ver=__If[2];
__Agt=null,__If=null;
if(_Br=="msie"){iBrowser=0;}
else if(_Br=="firefox"){iBrowser=1;}
else{iBrowser=2;}
}
//------------------------------------------------------------------------------------------------
//加上滚动条
//------------------------------------------------------------------------------------------------
function createResizeScroll(){
var objs=getByTag("IMG");
var i,endi=objs.length;
var oFunc;
for(i=0;i<endi;i++){
if(objs.getAttribute("resizeable")=="1"){
var oFuncBox=document.createElement("DIV");//滚动条框
var oFuncLine=document.createElement("DIV");//滚动条背景
var oFuncBut=document.createElement("P");//滚动条本体
oFuncBut.style.marginLeft="5px";
oFuncBut._forobj=objs;
oFuncBut.onmousedown=readyMoveScrollBut;
oFuncBut.onmouseup=doneMoveScrollBut;
oFuncBox.className="scrollX";
oFuncBox.style.display="none";
oFuncBox.onmouseover=function(){this.style.display=’block’;};
oFuncBox.onmouseout=function(){this.style.display=’none’;};
oFuncBox.onselectstart=oFuncLine.onselectstart=oFuncBut.onselectstart=function(){return false;};//防止被选中
oFuncBox._type=oFuncLine._type=oFuncBut._type="ScrollX";//给滚动条框加上标志，鼠标移出滚动条框后就要中止
oFuncLine.appendChild(oFuncBut);
oFuncBox.appendChild(oFuncLine);
objs.parentNode.insertBefore(oFuncBox,objs);
objs._width=objs.width;
objs._height=objs.height;
objs.onmouseover=function(){this.parentNode.childNodes[0].style.display="block";};
objs.onmouseout=function(){this.parentNode.childNodes[0].style.display="none";};
}
}
}
//------------------------------------------------------------------------------------------------
//准备移动
//------------------------------------------------------------------------------------------------
function readyMoveScrollBut(e){
oScroll=this;
sScrollState="move";
iScrollPos=getPostion("x",e);//获取鼠标坐标并保存
this._left=parseInt(this.style.marginLeft);
var img=this._forobj;
var oImg=new Image;
oImg.src=img.src;
//滚动条的移动范围是200像素
//这里计算出宽高的换算比例并保存
img._wbl=(oImg.width-img._width)/200;
img._hbl=(oImg.height-img._height)/200;
}
//------------------------------------------------------------------------------------------------
//完成并清除全局变量
//------------------------------------------------------------------------------------------------
function doneMoveScrollBut(e){
oScroll=null;
sScrollState=null;
iScrollPos=0;
}
//------------------------------------------------------------------------------------------------
//鼠标移动
//------------------------------------------------------------------------------------------------
function moveScrollBut(e){
//获取事件源
var oEvent=getEvent(e);
if(oScroll!=null && sScrollState=="move"){
if(oEvent._type=="ScrollX"){//只有在指定的范围内触发移动
var n_x=getPostion("x",e);
n_x-=iScrollPos;
n_x+=oScroll._left;
if(n_x<5)n_x=5;
if(n_x>205)n_x=205;
oScroll.style.marginLeft=n_x+"px";
//经过计算得出滚动条的marginLeft值（margin-left的取值范围为[5~205]px）
n_x-=5;
//将滚动条的位置值换算成宽高值（之前已经计算得到了宽高的换算比例），赋给图片
var img=oScroll._forobj;
img.width=n_x*img._wbl+img._width;
img.height=n_x*img._hbl+img._height;
}else{doneMoveScrollBut();}
}
}
//------------------------------------------------------------------------------------------------
//给对象的指定事件加上函数功能
//------------------------------------------------------------------------------------------------
function AttachEvent(object,eventName,func,cancelBubble){
var cb=cancelBubble?true:false;
eventName=eventName.toLowerCase();
if(document.attachEvent){object.attachEvent(eventName,func);}
else{object.addEventListener(eventName.substr(2),func,cb);}
}
//------------------------------------------------------------------------------------------------
//简写函数
//------------------------------------------------------------------------------------------------
function getById(str){return document.getElementById(str);}
function getByName(str){return document.getElementsByName(str);}
function getByTag(str){return document.getElementsByTagName(str);}
//------------------------------------------------------------------------------------------------
//获取鼠标坐标
//------------------------------------------------------------------------------------------------
function getPostion(XorY,e){
if(iBrowser==0){
if(XorY=="x"){return event.x;}
else if(XorY=="y"){return event.y;}
else{return false;}
}
else{
if(XorY=="x"){return e.pageX;}
else if(XorY=="y"){return e.pageY;}
else{return false;}
}
}
//------------------------------------------------------------------------------------------------
//获取事件对象
//------------------------------------------------------------------------------------------------
function getEvent(e){
if(iBrowser==0){return event.srcElement;}
else{return e.target;}
}
//------------------------------------------------------------------------------------------------
//加入事件监听
//------------------------------------------------------------------------------------------------
AttachEvent(window,"onload",winInit,false);
AttachEvent(window,"onload",createResizeScroll,false);
AttachEvent(document,"onmousemove",moveScrollBut,false);
AttachEvent(document,"onmouseup",doneMoveScrollBut,false);
</script>
</head>
<body>
<div style="margin:10px 0 0 40px;padding:10px 0;">
<div class="img"><img src="http://www.blueshut.com/cj/Bluehills.jpg" height="100" resizeable="1" galleryimg="no" /></div>
<div class="img"><img src="http://www.blueshut.com/cj/Sunset.jpg" width="300" resizeable="1" galleryimg="no" /></div>
<div class="img"><img src="http://www.blueshut.com/cj/Waterlilies.jpg" width="200" resizeable="1" galleryimg="no" /></div>
<div class="img"><img src="http://www.blueshut.com/cj/Winter.jpg" width="100" resizeable="1" galleryimg="no" /></div>
</div>
</body>
</html>

<!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>无标题文档</title>
<style type="text/css">

</style>
<script language="javascript" type="text/javascript">
//----------------------------------------------------------------------------------------------
// 功能说明：用于放大图片的滚动条，可放大至图片的原始大小。在ie6,ie7,ff1.5下可用
// 使用方法：在图片代码里加上resizeable=1，同时在onload事件里加上createResizeScroll函数
// code by: blues[2007-7-17]
//----------------------------------------------------------------------------------------------
//始初化变量
var oScroll=null,sScrollState=null,iScrollPos=0,iBrowser;
//------------------------------------------------------------------------------------------------
//页面初始化函数
//------------------------------------------------------------------------------------------------
function winInit(){
//检测浏览器类型
var __Agt = navigator.userAgent.toLowerCase();
var __If = /(firefox|netscape|opera).?[\/| ](.)\.([^;\)]+|[^\)]+\))$/.exec(__Agt);
if(!__If) __If = /(msie) (.)\.[^;]+;/.exec(__Agt);
var _Br=__If[1], _Ver=__If[2];
__Agt=null,__If=null;
if(_Br=="msie"){iBrowser=0;}
else if(_Br=="firefox"){iBrowser=1;}
else{iBrowser=2;}
}
//------------------------------------------------------------------------------------------------
//加上滚动条
//------------------------------------------------------------------------------------------------
function createResizeScroll(){
var objs=getByTag("IMG");
var i,endi=objs.length;
var oFunc;
for(i=0;i<endi;i++){
if(objs.getAttribute("resizeable")=="1"){
var oFuncBox=document.createElement("DIV");//滚动条框
var oFuncLine=document.createElement("DIV");//滚动条背景
var oFuncBut=document.createElement("P");//滚动条本体
oFuncBut.style.marginLeft="5px";
oFuncBut._forobj=objs;
oFuncBut.onmousedown=readyMoveScrollBut;
oFuncBut.onmouseup=doneMoveScrollBut;
oFuncBox.className="scrollX";
oFuncBox.style.display="none";
oFuncBox.onmouseover=function(){this.style.display='block';};
oFuncBox.onmouseout=function(){this.style.display='none';};
oFuncBox.onselectstart=oFuncLine.onselectstart=oFuncBut.onselectstart=function(){return false;};//防止被选中
oFuncBox._type=oFuncLine._type=oFuncBut._type="ScrollX";//给滚动条框加上标志，鼠标移出滚动条框后就要中止
oFuncLine.appendChild(oFuncBut);
oFuncBox.appendChild(oFuncLine);
objs.parentNode.insertBefore(oFuncBox,objs);
objs._width=objs.width;
objs._height=objs.height;
objs.onmouseover=function(){this.parentNode.childNodes[0].style.display="block";};
objs.onmouseout=function(){this.parentNode.childNodes[0].style.display="none";};
}
}
}
//------------------------------------------------------------------------------------------------
//准备移动
//------------------------------------------------------------------------------------------------
function readyMoveScrollBut(e){
oScroll=this;
sScrollState="move";
iScrollPos=getPostion("x",e);//获取鼠标坐标并保存
this._left=parseInt(this.style.marginLeft);
var img=this._forobj;
var oImg=new Image;
oImg.src=img.src;
//滚动条的移动范围是200像素
//这里计算出宽高的换算比例并保存
img._wbl=(oImg.width-img._width)/200;
img._hbl=(oImg.height-img._height)/200;
}
//------------------------------------------------------------------------------------------------
//完成并清除全局变量
//------------------------------------------------------------------------------------------------
function doneMoveScrollBut(e){
oScroll=null;
sScrollState=null;
iScrollPos=0;
}
//------------------------------------------------------------------------------------------------
//鼠标移动
//------------------------------------------------------------------------------------------------
function moveScrollBut(e){
//获取事件源
var oEvent=getEvent(e);
if(oScroll!=null && sScrollState=="move"){
if(oEvent._type=="ScrollX"){//只有在指定的范围内触发移动
var n_x=getPostion("x",e);
n_x-=iScrollPos;
n_x+=oScroll._left;
if(n_x<5)n_x=5;
if(n_x>205)n_x=205;
oScroll.style.marginLeft=n_x+"px";
//经过计算得出滚动条的marginLeft值（margin-left的取值范围为[5~205]px）
n_x-=5;
//将滚动条的位置值换算成宽高值（之前已经计算得到了宽高的换算比例），赋给图片
var img=oScroll._forobj;
img.width=n_x*img._wbl+img._width;
img.height=n_x*img._hbl+img._height;
}else{doneMoveScrollBut();}
}
}
//------------------------------------------------------------------------------------------------
//给对象的指定事件加上函数功能
//------------------------------------------------------------------------------------------------
function AttachEvent(object,eventName,func,cancelBubble){
var cb=cancelBubble?true:false;
eventName=eventName.toLowerCase();
if(document.attachEvent){object.attachEvent(eventName,func);}
else{object.addEventListener(eventName.substr(2),func,cb);}
}
//------------------------------------------------------------------------------------------------
//简写函数
//------------------------------------------------------------------------------------------------
function getById(str){return document.getElementById(str);}
function getByName(str){return document.getElementsByName(str);}
function getByTag(str){return document.getElementsByTagName(str);}
//------------------------------------------------------------------------------------------------
//获取鼠标坐标
//------------------------------------------------------------------------------------------------
function getPostion(XorY,e){
if(iBrowser==0){
if(XorY=="x"){return event.x;}
else if(XorY=="y"){return event.y;}
else{return false;}
}
else{
if(XorY=="x"){return e.pageX;}
else if(XorY=="y"){return e.pageY;}
else{return false;}
}
}
//------------------------------------------------------------------------------------------------
//获取事件对象
//------------------------------------------------------------------------------------------------
function getEvent(e){
if(iBrowser==0){return event.srcElement;}
else{return e.target;}
}
//------------------------------------------------------------------------------------------------
//加入事件监听
//------------------------------------------------------------------------------------------------
AttachEvent(window,"onload",winInit,false);
AttachEvent(window,"onload",createResizeScroll,false);
AttachEvent(document,"onmousemove",moveScrollBut,false);
AttachEvent(document,"onmouseup",doneMoveScrollBut,false);
</script>
</head>
<body>
<div style="margin:10px 0 0 40px;padding:10px 0;">
<div class="img"><img src="http://www.blueshut.com/cj/Bluehills.jpg" height="100" resizeable="1" galleryimg="no" /></div>
<div class="img"><img src="http://www.blueshut.com/cj/Sunset.jpg" width="300" resizeable="1" galleryimg="no" /></div>
<div class="img"><img src="http://www.blueshut.com/cj/Waterlilies.jpg" width="200" resizeable="1" galleryimg="no" /></div>
<div class="img"><img src="http://www.blueshut.com/cj/Winter.jpg" width="100" resizeable="1" galleryimg="no" /></div>
</div>
</body>
</html>

用滚动条来放大缩小图片,超酷

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