var scaleW = this.imgW / this.images[this.curId].width;
var scaleH = this.imgH / this.images[this.curId].height;
if(scaleW > scaleH) {
this.images[this.curId].height = this.imgH;
this.images[this.curId].scale.x = this.images[this.curId].scale.y;
}else{
this.images[this.curId].width = this.imgW;
this.images[this.curId].scale.y = this.images[this.curId].scale.x;
}