Javascript validation

simple javascript validation with jQuery

HTML

<label for="day">Day<input type="text" id="day" name="day"/></label><br />
<label for="month">Month<input type="text" id="month" name="month" maxlength=2/></label>

<input type="submit" onclick="validate()" value="test"/>
  <pre id="original"></pre>
        <pre id="trimmed"></pre>

JavaScript

function validate(){
alert("hi");
    return false;
     
}
var str = "         lots of spaces before and after         ";
  $("#original").html("Original String: '" + str + "'");
  $("#trimmed").html("$.trim()'ed: '" + $.trim(str) + "'");
$('#day').live('keydown', function(e){
        keyCode = e.keyCode || e.which;
        if(keyCode == 9){
            if($(this).val()<1 || $(this).val()>32){
               e.preventDefault();
               $(this).trigger('select');
               console.log('error'); 
            }   
        }        
    });
    $('#month').live('keydown', function(e){
        keyCode = e.keyCode || e.which;
        if(keyCode == 9){
            if($(this).val()<1 || $(this).val()>12){
               e.preventDefault();
               $(this).trigger('select');
               console.log('error'); 
            }   
        }        
    });