/**
*
*  Scrollable HTML table
*  http://www.webtoolkit.info/
*
**/
 
function ScrollableTable (tableEl, tableHeight, tableWidth) {
 
  this.initIEengine = function () {
 
    this.containerEl.style.overflowY = 'auto';
    if (this.tableEl.parentElement.clientHeight - this.tableEl.offsetHeight < 0) {
      this.tableEl.style.width = this.newWidth - this.scrollWidth +'px';
    } else {
      this.containerEl.style.overflowY = 'hidden';
      this.tableEl.style.width = this.newWidth +'px';
    }
 
    if (this.thead) {
      var trs = this.thead.getElementsByTagName('tr');
      for (x=0; x<trs.length; x++) {
        trs[x].style.position ='relative';
        trs[x].style.setExpression("top",  "this.parentElement.parentElement.parentElement.scrollTop + 'px'");
      }
    }
 
    if (this.tfoot) {
      var trs = this.tfoot.getElementsByTagName('tr');
      for (x=0; x<trs.length; x++) {
        trs[x].style.position ='relative';
        trs[x].style.setExpression("bottom",  "(this.parentElement.parentElement.offsetHeight - this.parentElement.parentElement.parentElement.clientHeight - this.parentElement.parentElement.parentElement.scrollTop) + 'px'");
      }
    }
 
    eval("window.attachEvent('onresize', function () { document.getElementById('" + this.tableEl.id + "').style.visibility = 'hidden'; document.getElementById('" + this.tableEl.id + "').style.visibility = 'visible'; } )");
  };
 
 
  this.initFFengine = function () {
    this.containerEl.style.overflow = 'hidden';
    this.tableEl.style.width = this.newWidth + 'px';
 
    var headHeight = (this.thead) ? this.thead.clientHeight : 0;
    var footHeight = (this.tfoot) ? this.tfoot.clientHeight : 0;
    var bodyHeight = this.tbody.clientHeight;
    var trs = this.tbody.getElementsByTagName('tr');
    if (bodyHeight >= (this.newHeight - (headHeight + footHeight))) {
      this.tbody.style.overflow = '-moz-scrollbars-vertical';
      for (x=0; x<trs.length; x++) {
        var tds = trs[x].getElementsByTagName('td');
        tds[tds.length-1].style.paddingRight += this.scrollWidth + 'px';
      }
    } else {
      this.tbody.style.overflow = '-moz-scrollbars-vertical';
    }
 
    var ExtraHeadHeight = 15; // this appears to be necessary on Firefox when using the tablesort function.
    var cellSpacing = (this.tableEl.offsetHeight - (this.tbody.clientHeight + headHeight + footHeight)) / 4;
    this.tbody.style.height = (this.newHeight - (headHeight + cellSpacing * 2) - (footHeight + cellSpacing * 2) - ExtraHeadHeight) + 'px';
 
  };
 
  this.tableEl = tableEl;
  this.scrollWidth = 16;
 
  this.originalHeight = this.tableEl.clientHeight;
  this.originalWidth = this.tableEl.clientWidth;
 
  this.newHeight = parseInt(tableHeight);
  this.newWidth = tableWidth ? parseInt(tableWidth) : this.originalWidth;
 
  this.tableEl.style.height = 'auto';
  this.tableEl.removeAttribute('height');
 
  this.containerEl = this.tableEl.parentNode.insertBefore(document.createElement('div'), this.tableEl);
  this.containerEl.appendChild(this.tableEl);
  this.containerEl.style.height = this.newHeight + 'px';
  this.containerEl.style.width = this.newWidth + 'px';
 
 
  var thead = this.tableEl.getElementsByTagName('thead');
  this.thead = (thead[0]) ? thead[0] : null;
 
  var tfoot = this.tableEl.getElementsByTagName('tfoot');
  this.tfoot = (tfoot[0]) ? tfoot[0] : null;
 
  var tbody = this.tableEl.getElementsByTagName('tbody');
  this.tbody = (tbody[0]) ? tbody[0] : null;
 
  if (!this.tbody) return;
 
  if (document.all && document.getElementById && !window.opera) this.initIEengine();
  if (!document.all && document.getElementById && !window.opera) this.initFFengine();
 
 
}