// JavaScript Document

function conditional_block(cond, id) {
    var true_block = document.getElementById(id);
    var false_block = document.getElementById(id + '_else');
    if (cond) {
        if (true_block) {
            var display = true_block.getAttribute('mt:display_style');
            if (!display && false_block)
                display = false_block.getAttribute('mt:display_style');
            if (!display) display = '';
            true_block.style.display = display;
        }
        if (false_block) 
            false_block.style.display = 'none';
    }
    else {
        if (true_block)
            true_block.style.display = 'none';
        if (false_block) {
            var display = false_block.getAttribute('mt:display_style');
            if (!display && true_block)
                display = false_block.getAttribute('mt:display_style');
            if (!display) display = '';
            false_block.style.display = display;
        }
    }
}