function toggle (rowid, buttonid) { 

   var row = document.getElementById(rowid); 
   var button = document.getElementById(buttonid); 
   
   if (row.className=="hide") { 
      row.className="show";
	  button.src="images/tour-less.gif";
   } 
   else { 
      row.className="hide";
	  button.src="images/tour-more.gif";
 
   } 
}

function showPic (whichpic) { 
	if (document.getElementById) { 
		document.getElementById('placeholder').src = whichpic.href; 
		if (whichpic.title) { 
			document.getElementById('desc').childNodes[0].nodeValue = whichpic.title; 
		} else { 
			document.getElementById('desc').childNodes[0].nodeValue = whichpic.childNodes[0].nodeValue; 
		} 
		return false; 
	} else { 
		return true; 
	} 
}

function nav() {
   var w = document.myform.category.selectedIndex;
   var url_add = document.myform.category.options[w].value;
   window.location.href = url_add;
}


function addLoadEvent(func) {

        var oldonload = window.onload;
        if (typeof window.onload != 'function') {

                window.onload = func;

        } else {

                window.onload = function() {
                        if (oldonload) {
                                oldonload();
                        }
                func();
                }
        }
}