如何禁用和启用JavaScript中的下拉列表框?

问题描述：

你好，

Hello ,

function validateRelationshipGender() {

        var gender, genderForm;
        gender = document.getElementById("NewUser:ContactPersonGender").value;
        genderForm = document.getElementById("NewUser:ContactPersonGender").disabled = true;
        if (gender == "Male" || gender == "Female") {

            genderForm = document.getElementById("NewUser:ContactPersonGender").disabled = false;

        }

    }

答

我建议使用jQuery，它使JavaScipting的编写和读取更加容易:

要使用jQuery禁用控件，请使用attr()函数，将属性作为第一个参数，将值作为第二个参数.

I would recommend using jQuery, it makes JavaScipting easier to write and read:

To disable a control using jQuery use the attr() function passing in the attribute as the first parameter and value as the second.

(" ).attr(" ，> true );

("#ddlc").attr("disabled", true);

其中ddlc是控件的ID(在我的情况下是ASP.NET，在您的情况下可能是JSF):

where ddlc is the id of the control (which in my case is ASP.NET and in yours probably JSF):

<asp:dropdownlist id="ddlc" runat="server" clientidmode="Static"></asp:dropdownlist>

有关jQuery详细文档，请参考: jQuery [ ^ ]

请让我知道这是否对您不起作用，我将删除此解决方案.

For detailed jQuery documentation refer: jQuery[^]

Please let me know if this doesn''t work for you and I will remove this solution.

如何禁用和启用JavaScript中的下拉列表框?

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