下是一段获取元素位置，并通过判断index值，使其向左或向右运动的代码局部。在运行过程中报错，this._setPara is not a funtion...百思不得其解，请各位指教~多谢~
1
1253 _setPara : function(){
this._b = this.swContainer.css("left");
this._move();
},
moveLeft : function(){
this._setPara();
this.index++;
if(this.index == this.swCounter){
setTimeout(this.moveRight, this.swDuration);
}else{
setTimeout(this.moveLeft, this.swDuration);
}
},
moveRight : function(){
this._setPara();
this.index--;
if(this.index == 0){
setTimeout(this.moveLeft, this.swDuration);
}else{
setTimeout(this.moveRight, this.swDuration);
}
},
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放入setTimeout内部的函数，this会指向window，而不再是原对象。
解决方法： var _self = this;