};
style.setOpacity(obj,0);
time = time || 200;
var opacity = 0,step = time / 20;
clearTimeout(obj.showT);
obj.showT = setTimeout(function(){
if(opacity >= 1) { style.setOpacity(obj,1); return; }
opacity +=1/step;
style.setOpacity(obj,opacity);
obj.showT = setTimeout(arguments.callee,20);
},20);
},
/**
渐隐元素
@param {Element} target 目标元素
**/
fadeOut : function(obj,time){
time = time || 200;
style.setOpacity(obj,1);
var opacity = 1,step = time / 20;
clearTimeout(obj.showT);
obj.showT = setTimeout(function(){
if(opacity <= 0){
obj.style.display = ‘none’;
style.setOpacity(obj,0);
return;
};
opacity -= 1/step;
obj.showT = setTimeout(arguments.callee,20);
},20);
},
