var popupWindow = null;

function popup(url,width,height) {

 if(popupWindow!=null)
  {
  if (typeof(popupWindow) == "object")
   popupWindow.close();
//   popupWindow = null;
  }
        var width=width+18;
        var height=height;
        var top  = (screen.height - height) / 2;
        var left = (screen.width  - width)  / 2;
        $popup='popup'+width+'x'+height;
    popupWindow = window.open(url,$popup,'toolbar=no,menubar=no,scrollbars=yes,resize=no,titlebar=no,resizable=no,width='+width+',height='+height+',top='+top+',left='+left+'');
        popupWindow.focus();
}
	
function setCheckboxes(the_form, do_check)
{
    var elts      = (typeof(document.forms[the_form].elements['selected_db[]']) != 'undefined')
                  ? document.forms[the_form].elements['selected_db[]']
                  : (typeof(document.forms[the_form].elements['selected_tbl[]']) != 'undefined')
          ? document.forms[the_form].elements['selected_tbl[]']
          : document.forms[the_form].elements['selected_fld[]'];
    var elts_cnt  = (typeof(elts.length) != 'undefined')
                  ? elts.length
                  : 0;

    if (elts_cnt) {
        for (var i = 0; i < elts_cnt; i++) {
            elts[i].checked = do_check;
        } // end for
    } else {
        elts.checked        = do_check;
    } // end if... else

    return true;
} // end of the 'setCheckboxes()' function


function findObj(n, d)
{ 
	var p, i, x;

	if(!d) d = document;
	if((p = n.indexOf("?")) > 0 && parent.frames.length)
	{
		d = parent.frames[n.substring(p + 1)].document;
		n = n.substring(0, p);
	}

	for(i = 0; !x && i < d.forms.length; i++)
	{
		x = d.forms[i][n];
	}
	if(!x)
	{
		if(!(x = d[n]) && d.all)
		{
			x = d.all[n];
		}
		for(i = 0; !x && d.layers && i < d.layers.length; i++)
		{
			x = findObj(n, d.layers[i].document);
		}
		if(!x && document.getElementById)
		{
			x = document.getElementById(n);
		}
	}

	return x;
}

function showdiv(id) {
	if(document.getElementById(id).style.display=="block")
	    document.getElementById(id).style.display="none";
	else
    	document.getElementById(id).style.display="block";
 }