var prefix = 'ctl00_ContentPlaceHolder1_';



function validate_form(items) {

    var validate = true;
    var itemList = new Array();
    itemList = items.split(',');

    for (index = 0; index < itemList.length; index++) {

        var controlId = itemList[index];

        var field = $find(controlId);

        if (field == null)
            field = $find(prefix + controlId);            
        

        if (field != null) {
            if (field.get_value() == '') {
                display_warning(controlId, 'inline');
                validate = false;
            }
            else
                display_warning(controlId, 'none');
        }
    }
    
    if(!validate)
       alert('Complete los campos señalados como requeridos.');

    return validate;

    
}




function display_warning(id,display) {

    var img = document.getElementById('img' + id);

    if (img == null)
        img = document.getElementById(prefix + 'img' + id);

    if (img != null)
        img.style.display = display;
}