function translateAndSetImage(elem, nameOfPic) {
  jQuery(elem).attr("src", "/ise/img/lang/"+getLang()+"/"+nameOfPic);
}
Sets an image according to the selected language
The image will be searched within the path /ise/img/lang/*
@param elem {string} Selector of an image element, e. g. "#pic1"
@param nameOfPic {string} Name of the picture, e. g. "testPic.png"