Javascript while loop help!

[DNA180]

Into a php page I have 20 text boxes. I want to make a button, using javascript, and when user clicks on it the rest 19 text boxes to take 1st text box's text. I have done something like this but it isn't working... Any idea???

function Throw_PhotoStuff(){var pcount=1; while(pcount<20;){document.getElementById('photo_'+pcount).value = document.getElementById('photo_1').value; pcount++;}}

Thank you for your precius time!!!

[DNA180]

It's OK I found it... It was a syntax error. I should remove the semicolon from while(pcount<20;) to while(pcount<20).