Maxlength in jquery
HTML
<input type="text" size="5" id="inputTest"/>
JavaScript
var val;
$(document).delegate("#inputTest", 'keyup', function(e) {
val = $(this).val();
var maxlength = $(this).attr('size');
if($(this).val().length > maxlength) {
val = val.substring(0,maxlength);
$(this).prop("value", val);
}
});