function changeBlocks() {
                        var div1 = document.getElementById("block1");
                        var div2 = document.getElementById("block2");
                        var div3 = document.getElementById("block3");
                        div2.parentNode.insertBefore(div2, div1);
                        div3.parentNode.insertBefore(div3, div2);
                }

                function changeLinkBlocks() {
                        var div1 = document.getElementById("cont_lll");
                        var div2 = document.getElementById("nav_links");
                        div1.parentNode.insertBefore(div2, div1);
                }

                function setHeight() {
                        var b0 = document.getElementById('block1');
                        var b1 = document.getElementById('main_div');
                        var b2 = document.getElementById('block2');
                        var b3 = document.getElementById('block3');
                        var h1 = b1.offsetHeight;
                        var h2 = b2.offsetHeight;
                        var h3 = b3.offsetHeight;
                        b0.style.height = (h1 - h2 - h3 - 483) + 'px';
                }

                function preLoad() {
                        document.getElementById('loader').className = 'hided';
                }





                function showMes(what) {
                        document.getElementById('fb_message').className = 'showed';
                        document.getElementById(what).className += ' showed';
                }

                function hideMes(what) {
                        document.getElementById('fb_message').className = 'hided';
                        document.getElementById(what).className = document.getElementById(what).className.replace(' showed','');
                }