jquery validation

jQuery(function($){
    //----- Validation for input box
    $('#title').keyup(function(event) {
        var caracteres = document.new_post.title.value.length;
        if (caracteres > 4){
            $('#titlevalidacion').html('<img src="<?php echo get_bloginfo(stylesheet_directory) . "/images/icons/accept.png" ?>"/>');
                 // #titlevalidacion is de id of a div next to title
            validar_title = true;
            revisarValidacion();
        } else{
            $('#titlevalidacion').html('<img src="<?php echo get_bloginfo(stylesheet_directory) . "/images/icons/cancel.png" ?>"/>');
            validar_titulo = false;
            revisarValidacion();
        }
    });

    //Validation for a dropdown
    $('#clasificacion').change(function(){ //#clasificacion is de id of the dropdown
        var caracteres = document.new_post.clasificacion.selectedIndex;
        if (caracteres > 0 ){
            validar_categoria = true;
            $('#categoriaImg').html('<img src="<?php echo get_bloginfo(stylesheet_directory) . "/images/icons/accept.png" ?>"/>');
            revisarValidacion();
        } else{
            validar_categoria = false;
            //carrerasImg
            $('#categoriaImg').html('<img src="<?php echo get_bloginfo(stylesheet_directory) . "/images/icons/cancel.png" ?>"/>');
            revisarValidacion();
        }


    });


    //Now we check for both
    function revisarValidacion(){
        if( validar_title==true && validar_categoria==true){
            $('#submit').removeAttr('disabled');
            $('#submit').css('background-color','#80e684');
        } else{

            $('#submit').attr('disabled', 'disabled');
            $('#submit').css('background-color','#fd8e8c');
        }
    }


});