use variables within the survey

过去一年您使用【{ questionNames[2] }】时，对【卵巢高储备】患者，整个促排阶段，您使用纯FSH进行单一促排的比例是？

use variable in question title

Survey.FunctionFactory.Instance.register(“allESelection”, allESelection);

add function to survey

getVariable() / setVariable()

get and set the variable in survey, not necessary to be declared in JSON