如何使用JavaScript从下拉列表中选择一个值

Question

I am trying to select the a value from the dropdown list from the site http://www.snapdeal.com/product/samsung-galaxy-grand-duos-i9082/638689?HID=productGrid_mobiles_1

Code used :

var obj = document.getElementById('attribute-select-0'); 
    obj.options[1].selected = true;

If you manually select the from the dropdown you will see that the href and other attributes of the below div changes as you change the dropdown value

console.log(document.getElementById('BuyButton-1').href);

ISSUE Yhe issue I am facing is that am selecting the dropdown value using the code that i have mentioned above but still am not getting the change expected value in the console.log(document.getElementById('BuyButton-1').href);

EDIT Have also tried :

obj.selectedIndex = 'White';

But same result.

Dont know where am i doing wrong

Answer 1

$("#attribute-select-0").val("White");

或使用纯Javascript：

document.getElementById("attribute-select-0").value="White";