How do I get the value of a textfield without posting the form

Is there anyway I can get the value of a text field without posting a form. I would like to use the value somewhere else in开发者_高级运维 the same page.

The answer is to use some sort of client-side scripting.

With plain old Javascript, if your text field has ID 'textField':

document.getElementById('textField').value;

Or with jQuery:

$('#textField').text();

You can use JavaScript. textarea elements have a value property that holds whatever text is in them.

You can call a javascript function on any events (By example when your text field loose focus) and get the text field value by using the value property.

var t=document.getElementById('textField').value;  
alert(t);