function get_scroll_top(){
  var ScrollTop = document.body.scrollTop;
  if (ScrollTop == 0){
    if (window.pageYOffset){
      ScrollTop = window.pageYOffset;
    } else {
      ScrollTop = (document.body.parentElement) ? document.body.parentElement.scrollTop : 0;
    }
  }
  return ScrollTop;
}

function center_in_window( element ){
  xpos = ( $("#header").width() / 2 ) - ( $(element).width() / 2 );
  ypos = get_scroll_top() + ( $(window).height() / 2 ) - ( $(element).height() / 2 );
  $(element).css("left" , xpos );
  if( ypos < 45 ){
    ypos = 45;
  }
  //alert( ypos );
  ypos = 200;
  $(element).css("top" , ypos );
}

function showDiv(divId) {
    var theDiv = document.getElementById(divId);
    theDiv.style.display = "block";
}

function hideDiv(divId) {
    var theDiv = document.getElementById(divId);
    theDiv.style.display = "none";
}

function clearText(field){
   if (field.defaultValue == field.value) field.value = '';
}

function putBack(field){
  if (field.value=='') field.value = field.defaultValue; 
}

$(document).ready(function() {

  $('.jq_vid_thumb').bind("click" ,  function(){

    $('#main_content').append("<div id='vid_player' >###</div>");

      vid_index = 1;
      vid_index_to_play = 1;
      $('#vid_player').load("play_vid.php" , { vid_index : vid_index_to_play } , function(){
        $('.jq_close').bind("click" ,  function(){
          $('#vid_player').remove();
        });
     })

     center_in_window( '#vid_player' );

  });

});