如何在javascript的下拉列表中预先选择一个选项？

Question

我有一个下拉列表的代码

if (chosen == "Parade") {
  selbox.options[selbox.options.length] = new Option("Select Venue","");
  selbox.options[selbox.options.length] = new Option("Benavides Park","Benavides Park");
  selbox.options[selbox.options.length] = new Option("CME Auditorium","CME Auditorium");
  selbox.options[selbox.options.length] = new Option("Engineering Sports Complex","Engineering Sports Complex");
  selbox.options[selbox.options.length] = new Option("Field in front of Grandstand","Field in front of Grandstand");
  selbox.options[selbox.options.length] = new Option("Plaza Mayor","Plaza Mayor");
  selbox.options[selbox.options.length] = new Option("Quadricentennial Park","Quadricentennial Park");
  selbox.options[selbox.options.length] = new Option("Rectors Hall","Rectors Hall");
  selbox.options[selbox.options.length] = new Option("Seminary Gym","Seminary Gym");
  selbox.options[selbox.options.length] = new Option("Tinoco Park","Tinoco Park");
  selbox.options[selbox.options.length] = new Option("UST Grandstand","UST Grandstand");
  selbox.options[selbox.options.length] = new Option("UST Gymnasium","UST Gymnasium");
  selbox.options[selbox.options.length] = new Option("Venue not listed/outside UST","Venue not listed/outside UST");
}

选项"Benavides Park"的默认值是什么代码？在HTML中它就像这样

selected="selected"

在javascript中怎么样？

Answer 1

你需要使用

new Option("UST Grandstand","UST Grandstand", 1);

注意右边的1.这意味着选择