function pview(id) {
  var div = find_obj('div','v')[0];
  var h = 360;
  var w = 440;
  var y = ((screen.availHeight - h)/2) - 100;
  var x = ((screen.availWidth - h)/2);
  div.style.width = w;
  div.style.height = h;
  div.style.left = x;
  div.style.top = y + get_Y() - 50;
  div.style.visibility = 'visible';

  var tbl = find_obj('td','v')[0];
  tbl.innerHTML = '<img src="/images/'+id+'.jpg">';
}


function get_Y() {
    var x = 0, y = 0;
    if( typeof( window.pageYOffset ) == 'number' ) {
        // Netscape
        x = window.pageXOffset;
        y = window.pageYOffset;
    } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
        // DOM
        x = document.body.scrollLeft;
        y = document.body.scrollTop;
    } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
        // IE6 standards compliant mode
        x = document.documentElement.scrollLeft;
        y = document.documentElement.scrollTop;
    }
    return y;
}

function pclose() {
  var div = find_obj('div','v')[0];
  div.style.visibility = 'hidden';
}

function find_obj(tag,id,obj) {
  if (typeof(obj) == 'undefined') var obj = document;
  var objs = obj.getElementsByTagName(tag);
  var i = 0;
  var ret = new Array();
  for(i=0;i<objs.length;i++) {
    if (objs[i].id == id) ret[ret.length] = objs[i];
  }
  return ret;
}