How do i pass parameters that is input textbox value to ajax in jQuery

问题

My Ajax code

$(document).ready(function() {
    $("#sub").click(function() {
        $.ajax({
            type: "POST",
            url: "jqueryphp.php",
            data: "txt1=" + txt1,
            success: function(result) {
                $("div").html(result);
            }
        });
    });
});​

This is the form code . I want to pass txt1 value to Ajax

<input type="text" name="txt1" id="txt1" /><br>
<input type="button" name="sub" id="sub" value="click Me" />

I want to pass txt1 value to my php page using this Ajax function.

Please tell me what exactly will come in the data attribute of Ajax

回答1:

Send data as an object instead of a string and to retreive the value of the text field, use val():

$(document).ready(function() {
    $("#sub").click(function() {
        $.ajax({
            type: "POST",
            url: "jqueryphp.php",
            data: {
                txt1: $("#txt1").val()
            },
            success: function(result) {
                $("div").html(result);
            }
        });
    });
});​

http://api.jquery.com/val/

回答2:

Do you mean:

$(document).ready(function() {
    $("#sub").click(function() {
    var txt1 = $("#txt1").val(); //textbox value
        $.ajax({
            type: "POST",
            url: "jqueryphp.php",
            cache: false,
            data: "txt1=" + txt1,
            dataType: "html",
            success: function(result) {
                $("div").html(result);
            }
        });
    });
});​

来源：https://stackoverflow.com/questions/9372033/how-do-i-pass-parameters-that-is-input-textbox-value-to-ajax-in-jquery