Assegnate 5 su 5 stelle

that great.
how hide text in textarea
that give me this but i dont know how hide that text inside that
//textarea[@id='id_textarea']

edit:thank you for replay
but it not work
in this url http://urlchecker.net/ i want hide text inside multifile check

edit2:thank you now work

Questa recensione riguarda una versione precedente (0.3.4.1-signed.1-signed) del componente aggiuntivo. 

Try //textarea[@id='id_textarea']/text()

Update:

OK, try a right-click on the element, then `Yarip' > `TEXTAREA' > `Script element' and replace the function-example with the following:

function (array) {
array[0].value = ""; // set value of element to empty string
}