jQuery选中select控件 无法设置selected的解决方法

setTimeout(function() { 
var selSorts = $("select[id^='" + controls.selsort + "']"); 
$.each(selSorts, function(index, sort) { 
var ope = $(sort).find("option[value='" + arrSort[index] + "']"); 
if (ope.length > 0) 
ope[0].selected = true; 
}); 
}, 1);