[SOLVED] character legnth

[verN]

echo ('<p><input id="seminarT "name="seminarT" type="text" size="60" value="'.$sem_title.'" onchange="checkInput()" /></p>');

 

function checkInput() {

var str = document.getElementByName("seminarT").value;

if ( str.Length > 10 ) {

alert("Please enter less than 20 characters");

}

}

 

i am using this code but nothing gets outputted when I type in more then 20 charaters. Any hellp will be good. Thanks

[fenway]

getElementByName? Why?