做法：1、粳米浸泡2个小时；花生去皮煮熟备用2、将花生、粳米、适量清水放入食品加工机中打磨成稀糊状3、丰水梨洗净去皮切成块4、将梨打成泥，梨汁另存备用5、梨泥倒入花生米糊中，小火煮开6、边煮边添加清水，同时不
My script is supposed to dynamically change the background-position when clicking on a button (adding or substracting 1 percent from the current value). Works fine in Fx and Chrome, and ie8 too (i bel
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