js prepend方法，添加下拉选

    if(1==1){
	if ("${resultList!}".indexOf(",") > -1) {
	   $("#yourId").prepend("<option value selected>&nbsp;</option>");
	}
       } else {
	$("#yourId").prepend("<option value>&nbsp;</option>");
    }

标签：yourId,indexOf,else,resultList,js,下拉选,nbsp,prepend
来源： https://blog.csdn.net/qq_39822451/article/details/99689349