AJAX POST METHOD

Hi I'm using ajax for posting the data in to database, I'm using php as server background for posting the data in mysql database, for

 Ex: $name = $_POST['name'];
 $query = "INSERT INTO table('name') VALUES ('".$name."');
 $result = mysql_query($query)

when the user click on the submit button, i just made a onlick function of ajax post_data(), so what i need is i want the value in 开发者_如何学Cthe textbox so that i can pass it to ajax, how to get the value of the textbox

var url = "get_data.php";
var params = "name=?"; (how to get the name enter in the text box)
http.open("POST", url, true);


http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");

http.onreadystatechange = function() {//Call a function when the state changes.
    if(http.readyState == 4 && http.status == 200) {
        alert(http.responseText);
    }
}
http.send(params);

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You can give the textbox and id.

And then using this code

var textValue = document.getElementById("textboxid").value;

you can get as well set the value in the textbox.

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You shouldn't send $POST vars directly to the db. Look up sanitization.

var url = "get_data.php";
var validValue=validate(document.getElementById('textboxid').value) ;
var params = "name=?"+validValue;


http.open("POST", url, true);


<!-- assuming your text box is-->
<input type =textbox id="textboxid">

And don't forget to sanitize at the server side too.

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var params = "name=?"; (how to get the name enter in the text box)

you can try:

var params = "name="+document.getElementById('theTextBoxId').value;