JavaScript缓慢展开收缩层效果

February 10, 2010 | tags javascript 层 | views

Comments 0

<!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>一个JS展开收缩层的效果</title>
<STYLE>
body {
background-color: #EEEEEE;
margin: 0px;
text-align: center;
}
#wrap {
width: 736px;
background-color: #FFFFFF;
overflow: hidden;
margin: 12px;
padding: 12px;
}
#topcontainer {
height: 80px;
width: 732px;
background-color: #99FF66;
border: 1px solid #79F200;
}
#bodycontainer {
height: 400px;
width: 100%;
margin-top: 12px;
}
#bottomcontainer {
height: 60px;
width: 100%;
margin-top: 12px;
}
#topwrap {
width: 100%;
}
#leftcontainer {
background-color: #99FF66;
height: 400px;
width: 120px;
float: left;
border: 1px solid #79F200;
}
input {
background-color: #99FF66;
border-top-width: 1px;
border-right-width: 1px;
border-bottom-width: 1px;
border-left-width: 1px;
border-top-style: solid;
border-right-style: solid;
border-bottom-style: solid;
border-left-style: solid;
border-top-color: #79F200;
border-right-color: #79F200;
border-bottom-color: #79F200;
border-left-color: #79F200;
line-height: 28px;
background-position: center;
height: 30px;
}
</STYLE>
</head>

slider.names = new Array();

function slider()
{
this.id = slider.names.length;
slider.names[this.id] = this;
this.target  = document.getElementById(arguments[0]); //第一个参数：被操作div的id
this.direction = arguments[1];//第二个参数：div弹出的方向
this.height = arguments[2];//第三个参数：div的高度
this.width = arguments[3];//第四个参数：div的宽度
this.step = arguments[4];//第五个参数：希望动作分解为几步完成
this.timer = 10 * arguments[5];//第六个参数：每个动作的间隔时间，10ms为一个单位
this.startopa = arguments[6];//第七个参数：div开始的透明度
this.sparent = this.target.parentNode;//获取操作div的父容器
this.intervalid = null;//循环定时的id
this.i = 0;//循环的计数器
this.status = 0;//slider层的状态：0-可以展开；1-不可以展开
this.target.style.display = "none";//先将div隐去
return this;
}

slider.prototype.initialize = function()
{
this.sparent.style.overflow = "hidden";//设置父容器overflow
this.target.style.width = Number(this.width) + 'px';//设置目标div的宽度
this.target.style.height = Number(this.height) + 'px';//设置目标div的高度
this.target.style.position = "";//设置目标div的定位方式
this.target.style.display = "";//设置目标div的显示方式
this.target.style.filter = 'Alpha(opacity=' + Number(this.startopa) + ')';//设置目标div的透明度为初始透明度
this.target.style.overflow = "hidden";//设置overflow
switch(this.direction)//根据弹出方向设定div的margin
{
  case 1://left to right
   this.target.style.marginLeft = "-" + this.width + "px";
   break;
  case 2://top to bottom
   this.target.style.marginTop = "-" + this.height + "px";
   break;
  case 3://right to left
   this.target.style.marginRight = "-" + this.width + "px";
   break;
}
}

slider.prototype.show = function()
{

if (this.status==0)//检查状态是否已经展开
{
  this.initialize();//操作div及其父容器的初始化
  this.intervalid = window.setInterval("slider.names["+this.id+"].cycle()",this.timer);//设置动作循环
 
}
}

slider.prototype.hide = function()
{
if (this.status==1)//检查状态是否已经展开
{
  this.intervalid = window.setInterval("slider.names["+this.id+"].decycle()",this.timer);//设置动作循环
 
}
}

slider.prototype.cycle = function() //单步循环动作
{
var opa = this.target.style.filter.split("=")[1].split(")")[0]//获取目标div的透明度数值
var opastep = Math.round(((100 - Number(opa)) / this.step)+2.5);//计算每步增加的透明度
var nopa = Number(opa) + Number(opastep);//当前透明度
if (nopa>100){this.target.style.filter = 'Alpha(opacity=100)';}else{this.target.style.filter = 'Alpha(opacity=' + String(nopa) + ')';}//给div透明度赋值
switch(this.direction)//根据弹出方向计算和设定div的动作
{
  case 1:  //left to right
   var opx = this.target.style.marginLeft.split("px")[0];
   var pxstep = Math.round((this.width / this.step)+0.5);
   var npx = Number(opx) + Number(pxstep);
   if (npx>0){this.target.style.marginLeft = '0px';}else{this.target.style.marginLeft = String(npx) + 'px';}
   break;
  case 2:  //top to bottom
   var opx = this.target.style.marginTop.split("px")[0];
   var pxstep = Math.round((this.height / this.step)+0.5);
   var npx = Number(opx) + Number(pxstep);
   if (npx>0){this.target.style.marginTop = '0px';}else{this.target.style.marginTop = String(npx) + 'px';}
   break;
  case 3:  //right to left
   var opx = this.target.style.marginRight.split("px")[0];
   var pxstep = Math.round((this.width / this.step)+0.5);
   var npx = Number(opx) + Number(pxstep);
   if (npx>0){this.target.style.marginRight = '0px';}else{this.target.style.marginRight = String(npx) + 'px';}
   break;
}
this.i++ //计数器+1
if (this.i>(this.step-1)){window.clearInterval(this.intervalid);this.i=0;this.status=1;} //循环完毕，清除循环定时
}

slider.prototype.decycle = function() //单步循环动作
{
var opa = this.target.style.filter.split("=")[1].split(")")[0]//获取目标div的透明度数值
var opastep = Math.round(((100 - Number(opa)) / this.step)+2.5)*2;//计算每步增加的透明度
var nopa = Number(opa) - Number(opastep);//当前透明度
if (nopa<this.startopa){this.target.style.filter = 'Alpha(opacity=' + this.startopa + ')';}else{this.target.style.filter = 'Alpha(opacity=' + String(nopa) + ')';}//给div透明度赋值

switch(this.direction)//根据弹出方向计算和设定div的动作
{
  case 1:  //left to right
   var opx = this.target.style.marginLeft.split("px")[0];
   var pxstep = Math.round((this.width / Math.round(this.step*0.5))+0.5);
   var npx = Number(opx) - Number(pxstep);
   if (Math.abs(npx)>this.width+2){this.target.style.marginLeft = '-' + this.width + 'px';}else{this.target.style.marginLeft = String(npx) + 'px';}
   break;
  case 2:  //top to bottom
   var opx = this.target.style.marginTop.split("px")[0];
   var pxstep = Math.round((this.height / Math.round(this.step*0.5))+0.5);
   var npx = Number(opx) - Number(pxstep);
   if (Math.abs(npx)>this.height+2){this.target.style.marginTop = '-' + this.height + 'px';}else{this.target.style.marginTop = String(npx) + 'px';}
   break;
  case 3:  //right to left
   var opx = this.target.style.marginRight.split("px")[0];
   var pxstep = Math.round((this.width / Math.round(this.step*0.5))+0.5);
   var npx = Number(opx) - Number(pxstep);
   if (Math.abs(npx)>this.width+2){this.target.style.marginRight = '-' + this.width + 'px';}else{this.target.style.marginRight = String(npx) + 'px';}
   break;
}
this.i++ //计数器+1
if (this.i>(Math.round(this.step*0.5)-1)){window.clearInterval(this.intervalid);this.i=0;this.status=0;this.target.style.display = "none";} //循环完毕，清除循环定时
}

//关于如何使用这个代码的说明：
//上面的代码可以封装成为一个单独的js文件，然后包含在页面当中
//然后使用下面的代码进行slider初始化，一个页面可以使用多个slider，下面的代码必须在页面底部</body>之前，否则可能会报错
var topslider = new slider('topcontainer',2,80,734,20,2,20);
var leftslider = new slider('leftcontainer',1,398,120,20,1,20);
//参数分别代表的意义可以在代码顶端看到
//控制slider动作可以使用两种方式
//一种是使用下面声明的名字调用，比如topslider.show(),topslider.hide()
//另一种可以使用slider.names[0].show(),slider.names[0].hide()，下标取决于slider初始化的顺序

</script>

</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>一个JS展开收缩层的效果</title> <STYLE> body { background-color: #EEEEEE; margin: 0px; text-align: center; } #wrap { width: 736px; background-color: #FFFFFF; overflow: hidden; margin: 12px; padding: 12px; } #topcontainer { height: 80px; width: 732px; background-color: #99FF66; border: 1px solid #79F200; } #bodycontainer { height: 400px; width: 100%; margin-top: 12px; } #bottomcontainer { height: 60px; width: 100%; margin-top: 12px; } #topwrap { width: 100%; } #leftcontainer { background-color: #99FF66; height: 400px; width: 120px; float: left; border: 1px solid #79F200; } input { background-color: #99FF66; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #79F200; border-right-color: #79F200; border-bottom-color: #79F200; border-left-color: #79F200; line-height: 28px; background-position: center; height: 30px; } </STYLE> </head> <body> <div id="wrap"> <div align="left" style="margin-bottom:3px"> <input type="button" id="showtop" onclick="topslider.show();this.style.display='none';document.getElementById('hidetop').style.display='';" value="展开顶部"/> <input type="button" id="hidetop" value="关闭顶部" onclick="topslider.hide();this.style.display='none';document.getElementById('showtop').style.display='';" style="display:none"/> </div> <div id="topwrap"> <div id="topcontainer" style="display:none"></div> </div> <div id="bodycontainer"> <div id="leftcontainer" style="display:none"> </div> <div align="left"> <input type="button" id="showleft" value="展开左侧" onclick="leftslider.show();this.style.display='none';document.getElementById('hideleft').style.display='';"/> <input type="button" id="hideleft" value="关闭左侧" onclick="leftslider.hide();this.style.display='none';document.getElementById('showleft').style.display='';" style="display:none"/> </div> </div> <div id="bottomcontainer"></div> </div> <script language="JavaScript" type="text/javascript"> slider.names = new Array(); function slider() { this.id = slider.names.length; slider.names[this.id] = this; this.target = document.getElementById(arguments[0]); //第一个参数：被操作div的id this.direction = arguments[1];//第二个参数：div弹出的方向 this.height = arguments[2];//第三个参数：div的高度 this.width = arguments[3];//第四个参数：div的宽度 this.step = arguments[4];//第五个参数：希望动作分解为几步完成 this.timer = 10 * arguments[5];//第六个参数：每个动作的间隔时间，10ms为一个单位 this.startopa = arguments[6];//第七个参数：div开始的透明度 this.sparent = this.target.parentNode;//获取操作div的父容器 this.intervalid = null;//循环定时的id this.i = 0;//循环的计数器 this.status = 0;//slider层的状态：0-可以展开；1-不可以展开 this.target.style.display = "none";//先将div隐去 return this; } slider.prototype.initialize = function() { this.sparent.style.overflow = "hidden";//设置父容器overflow this.target.style.width = Number(this.width) + 'px';//设置目标div的宽度 this.target.style.height = Number(this.height) + 'px';//设置目标div的高度 this.target.style.position = "";//设置目标div的定位方式 this.target.style.display = "";//设置目标div的显示方式 this.target.style.filter = 'Alpha(opacity=' + Number(this.startopa) + ')';//设置目标div的透明度为初始透明度 this.target.style.overflow = "hidden";//设置overflow switch(this.direction)//根据弹出方向设定div的margin { case 1://left to right this.target.style.marginLeft = "-" + this.width + "px"; break; case 2://top to bottom this.target.style.marginTop = "-" + this.height + "px"; break; case 3://right to left this.target.style.marginRight = "-" + this.width + "px"; break; } } slider.prototype.show = function() { if (this.status==0)//检查状态是否已经展开 { this.initialize();//操作div及其父容器的初始化 this.intervalid = window.setInterval("slider.names["+this.id+"].cycle()",this.timer);//设置动作循环 } } slider.prototype.hide = function() { if (this.status==1)//检查状态是否已经展开 { this.intervalid = window.setInterval("slider.names["+this.id+"].decycle()",this.timer);//设置动作循环 } } slider.prototype.cycle = function() //单步循环动作 { var opa = this.target.style.filter.split("=")[1].split(")")[0]//获取目标div的透明度数值 var opastep = Math.round(((100 - Number(opa)) / this.step)+2.5);//计算每步增加的透明度 var nopa = Number(opa) + Number(opastep);//当前透明度 if (nopa>100){this.target.style.filter = 'Alpha(opacity=100)';}else{this.target.style.filter = 'Alpha(opacity=' + String(nopa) + ')';}//给div透明度赋值 switch(this.direction)//根据弹出方向计算和设定div的动作 { case 1: //left to right var opx = this.target.style.marginLeft.split("px")[0]; var pxstep = Math.round((this.width / this.step)+0.5); var npx = Number(opx) + Number(pxstep); if (npx>0){this.target.style.marginLeft = '0px';}else{this.target.style.marginLeft = String(npx) + 'px';} break; case 2: //top to bottom var opx = this.target.style.marginTop.split("px")[0]; var pxstep = Math.round((this.height / this.step)+0.5); var npx = Number(opx) + Number(pxstep); if (npx>0){this.target.style.marginTop = '0px';}else{this.target.style.marginTop = String(npx) + 'px';} break; case 3: //right to left var opx = this.target.style.marginRight.split("px")[0]; var pxstep = Math.round((this.width / this.step)+0.5); var npx = Number(opx) + Number(pxstep); if (npx>0){this.target.style.marginRight = '0px';}else{this.target.style.marginRight = String(npx) + 'px';} break; } this.i++ //计数器+1 if (this.i>(this.step-1)){window.clearInterval(this.intervalid);this.i=0;this.status=1;} //循环完毕，清除循环定时 } slider.prototype.decycle = function() //单步循环动作 { var opa = this.target.style.filter.split("=")[1].split(")")[0]//获取目标div的透明度数值 var opastep = Math.round(((100 - Number(opa)) / this.step)+2.5)*2;//计算每步增加的透明度 var nopa = Number(opa) - Number(opastep);//当前透明度 if (nopa<this.startopa){this.target.style.filter = 'Alpha(opacity=' + this.startopa + ')';}else{this.target.style.filter = 'Alpha(opacity=' + String(nopa) + ')';}//给div透明度赋值 switch(this.direction)//根据弹出方向计算和设定div的动作 { case 1: //left to right var opx = this.target.style.marginLeft.split("px")[0]; var pxstep = Math.round((this.width / Math.round(this.step*0.5))+0.5); var npx = Number(opx) - Number(pxstep); if (Math.abs(npx)>this.width+2){this.target.style.marginLeft = '-' + this.width + 'px';}else{this.target.style.marginLeft = String(npx) + 'px';} break; case 2: //top to bottom var opx = this.target.style.marginTop.split("px")[0]; var pxstep = Math.round((this.height / Math.round(this.step*0.5))+0.5); var npx = Number(opx) - Number(pxstep); if (Math.abs(npx)>this.height+2){this.target.style.marginTop = '-' + this.height + 'px';}else{this.target.style.marginTop = String(npx) + 'px';} break; case 3: //right to left var opx = this.target.style.marginRight.split("px")[0]; var pxstep = Math.round((this.width / Math.round(this.step*0.5))+0.5); var npx = Number(opx) - Number(pxstep); if (Math.abs(npx)>this.width+2){this.target.style.marginRight = '-' + this.width + 'px';}else{this.target.style.marginRight = String(npx) + 'px';} break; } this.i++ //计数器+1 if (this.i>(Math.round(this.step*0.5)-1)){window.clearInterval(this.intervalid);this.i=0;this.status=0;this.target.style.display = "none";} //循环完毕，清除循环定时 } //关于如何使用这个代码的说明： //上面的代码可以封装成为一个单独的js文件，然后包含在页面当中 //然后使用下面的代码进行slider初始化，一个页面可以使用多个slider，下面的代码必须在页面底部</body>之前，否则可能会报错 var topslider = new slider('topcontainer',2,80,734,20,2,20); var leftslider = new slider('leftcontainer',1,398,120,20,1,20); //参数分别代表的意义可以在代码顶端看到 //控制slider动作可以使用两种方式 //一种是使用下面声明的名字调用，比如topslider.show(),topslider.hide() //另一种可以使用slider.names[0].show(),slider.names[0].hide()，下标取决于slider初始化的顺序 </script> </body> </html>

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