<script type="text/javascript">
var fadeEffect=function(){
return{
init:function(id, flag, target){
this.elem = document.getElementById(id);
clearInterval(this.elem.si);
this.target = target ? target : flag ? 100 : 0;
this.flag = flag || -1;
this.alpha = this.elem.style.opacity ? parseFloat(this.elem.style.opacity) * 100 : 0;
this.si = setInterval(function(){fadeEffect.tween()}, 20);
},
tween:function(){
if(this.alpha == this.target){
clearInterval(this.elem.si);
}else{
var value = Math.round(this.alpha + ((this.target - this.alpha) * .05)) + (1 * this.flag);
this.elem.style.opacity = value / 100;
this.elem.style.filter = \'alpha(opacity=\' + value + \')\';
this.alpha = value
}
}
}
}();
</script>