// Menu
var mid='';

Array.prototype.inArray = function (value) {
	var i;
	for (i=0; i < this.length; i++) {
		if (this[i] === value) {
			return true;
		}
	}
	return false;
};

function on(it) {
	var block = it.getElementsByTagName("ul")[0];
	if (block) {
	  if (mid!='' && mid!=block.id) {
	    var old=document.getElementById(mid);
		var oldimg=document.getElementById('imgCat'+mid);
	    old.style.display='none';
		oldimg.src="/images/folder_plus.gif";
      };

	  mid=block.id;
	  var img = document.getElementById('imgCat'+mid);
	  if (block.offsetHeight==0){
		block.style.display='block';
	  	img.src="/images/folder_minus.gif";
	  }
	  else{
	   block.style.display='none';
 	   img.src="/images/folder_plus.gif";
	   }
	}
}