js运动框架_包括图片的淡入淡出效果_javascript技巧

oDiv1.onmouseover=function(){
Move(oDiv1,"width",200);
//alert(getStyle(oDiv1,"width"));
}
oDiv1.onmouseout=function(){
Move(oDiv1,"width",100);
}
oDiv2.onmouseover=function(){
Move(oDiv2,"height",200);
}
oDiv2.onmouseout=function(){
Move(oDiv2,"height",100);
}
oDiv3.onmouseover=function(){
Move(oDiv3,"opacity",100);
}
oDiv3.onmouseout=function(){
Move(oDiv3,"opacity",30);
}

oDiv4.onmouseover=function(){
Move(oDiv4,"opacity",100);
}
oDiv4.onmouseout=function(){
Move(oDiv4,"opacity",30);
}
oDiv5.onmouseover=function(){
Move(oDiv5,"opacity",100);
}
oDiv5.onmouseout=function(){
Move(oDiv5,"opacity",30);
}

}
//获取行间样式
function getStyle(obj,attr) //getStyle 非行间属性 结果值为 ***px
{ if(obj.currentStyle)
{
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
　　 //多物体不同运动框架
function Move(obj,attr,itarget)
{
clearInterval(obj.timer);
obj.timer=setInterval(function(){
if(attr=="opacity")
{ cur=parseFloat(getStyle(obj,attr))*100;
speed=(itarget-cur)/10;
speed=speed>0?Math.ceil(speed):Math.floor(speed);

if(cur==itarget)
{
clearInterval(obj.timer);
}else
{ cur+=speed;
obj.style.opacity=cur/100;
obj.style.filter="alpha(opacity:"+cur+")";
}
}
else
{
cur=parseInt(getStyle(obj,attr));
speed=(itarget-cur)/10; //parseInt 获取的值转化为数
speed=speed>0?Math.ceil(speed):Math.floor(speed); //向下、向上取正

if(cur==itarget)
{
clearInterval(obj.timer);
}else
{
obj.style[attr]=cur+speed+"px";
}
}

},30)
}

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