var last_expanded = '';

function showHide(id) 
	{
	var obj = document.getElementById(id);
	var status = obj.className;
	if (status == 'hide') 
		{
		if (last_expanded != '') 
			{
			var last_obj = document.getElementById(last_expanded);
			last_obj.className = 'hide';
			}
		obj.className = 'show';
		last_expanded = id;
		}
		else
		{
		if (last_expanded != id) 
			{
			obj.className = 'hide';
			}
		}
	}

function callAHAH(url, pageElement, callMessage, errorMessage) {
     document.getElementById(pageElement).innerHTML = callMessage;
     try {
     req = new XMLHttpRequest(); /* e.g. Firefox */
     } catch(e) {
       try {
       req = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */
       } catch (e) {
         try {
         req = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */
         } catch (E) {
          req = false;
         } 
       } 
     }
     req.onreadystatechange = function() {responseAHAH(pageElement, errorMessage);};
     req.open("GET",url,true);
     req.send(null);
  }

function responseAHAH(pageElement, errorMessage) {
   var output = '';
   if(req.readyState == 4) {
      if(req.status == 200) {
         output = req.responseText;
         document.getElementById(pageElement).innerHTML = output;
         } else {
         document.getElementById(pageElement).innerHTML = errorMessage+"\n"+output;
         }
      }
  }


function makeactive(url1,target) { 
callAHAH(url1, target, '<center><img src="./img/loading.gif" /></center>', 'Error');

} 
function blocking(nr)
{
	if (document.getElementById)
	{
		current = (document.getElementById(nr).style.display == 'block') ? 'none' : 'block';
		document.getElementById(nr).style.display = current;
	}
	else if (document.all)
	{
		current = (document.all[nr].style.display == 'block') ? 'none' : 'block'
		document.all[nr].style.display = current;
	}
	else if (document.layers)
	{
		var i = parseInt(nr.substr(nr.length-1,1));
		var replacing = heights[i-1];
		if (shown[i])
		{
			shown[i] = false;
			replacing = -replacing;
			document.layers[nr].visibility = 'hide';
			document.layers[nr].top = safe;
		}
		else
		{
			shown[i] = true;
			document.layers[nr].visibility = 'show';
			var tempname = 'header' + i;
			document.layers[nr].top = document.layers[tempname].top + headerheight;
		}
		for (j=(i+1);j<=max;j++)
		{
			name1 = 'header' + j;
			document.layers[name1].top += replacing;
			if (shown[j])
			{
				name2 = 'number' + j;
				document.layers[name2].top += replacing;
			}
		}
	}
	else alert ('This link does not work in your browser.');
}
function numbersonly(myfield, e, dec)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);

// control keys
if ((key==null) || (key==0) || (key==8) || 
    (key==9) || (key==13) || (key==27) )
   return true;

// numbers
else if ((("0123456789.").indexOf(keychar) > -1))
   return true;

// decimal point jump
else if (dec && (keychar == "."))
   {
   myfield.form.elements[dec].focus();
   return false;
   }
else
   return false;
}