//$(document).ready(function(){
$(window).load(function(){

var el = $('#form_block_front');
var dh = $(document).height();
var hel = $('#form_block_front').height();
var phel = $('#content_section').height();
var ghel = (phel-hel)-10;

var elpos_original = el.offset().top;
$(window).scroll(function(){
    var elpos = el.offset().top;
    var windowpos = $(window).scrollTop();
    var windowheight = $(window).height();
    var finaldestination = windowpos;
    if(windowpos<elpos_original) {
        finaldestination = elpos_original;
        el.stop(true,false).css({'top':10});
        el.removeClass('tetap');
    } else if((dh - windowpos)<1300){
    	el.stop(true,false).css({'top':ghel});
    	el.removeClass('tetap');
    	} else {
        el.addClass('tetap');
    }
});

});