function highlightAllWords(words, action) {
	
	// display/hide links to switch higlight on/off
//	if(action == '') { // hide on-link
//		document.getElementById('hl_on').style.display = 'none';
//		document.getElementById('hl_off').style.display = 'inline';
//	}
//	else if(action == 'hide') {
//		document.getElementById('hl_on').style.display = 'inline';
//		document.getElementById('hl_off').style.display = 'none';
//	}
	
	words_arr = words.split(" ");
	for (w=0;w<words_arr.length;w++) {
		//highlightWord(document.getElementsByTagName("h1")[0],words_arr[w], action);
		highlightWord(document.getElementById("listing"),words_arr[w], action);
	}
}

function highlightWord(node,word,action) {
	
	// length of searchstring
	if(word.length < 2) {
		return false;
	}
		
	// Iterate into this nodes childNodes
	if (node.hasChildNodes) {
		var hi_cn;
		for (hi_cn=0;hi_cn<node.childNodes.length;hi_cn++) {
			highlightWord(node.childNodes[hi_cn],word, action);
		}
	}
	
	// And do this node itself
	if (node.nodeType == 3) { // text node
		tempNodeVal = node.nodeValue.toLowerCase();
		tempWordVal = word.toLowerCase();
		if (tempNodeVal.indexOf(tempWordVal) != -1) {
			pn = node.parentNode;
			tagName = pn.nodeName;
			// word has not already been highlighted!
			if (tagName != "H1" && pn.className != "sw" && pn.className != "none" && action == "") {
				nv = node.nodeValue;
				ni = tempNodeVal.indexOf(tempWordVal);
				// Create a load of replacement nodes
				before = document.createTextNode(nv.substr(0,ni));
				docWordVal = nv.substr(ni,word.length);
				after = document.createTextNode(nv.substr(ni+word.length));
				hiwordtext = document.createTextNode(docWordVal);
				hiword = document.createElement("i");
				hiword.className = "sw";
				hiword.appendChild(hiwordtext);
				pn.insertBefore(before,node);
				pn.insertBefore(hiword,node);
				pn.insertBefore(after,node);
				pn.removeChild(node);
			}
			// word is already been highlighted and now will be de-highlighted
			else if(action == "hide") {
				pn.className = "swo";
			}
		}
	}
}


function more_categories(a) {

   if(a == 'show') {
      var e_1 = 'block';
      var e_2 = 'none';
   }
   else {
      var e_1 = 'none';
      var e_2 = 'block';
   }
   
   document.getElementById('mc_1').style.display = e_2;
   document.getElementById('mc_2').style.display = e_1;
}


function more_manufacturers(a) {
   
   if(a == 'show') {
      var e_1 = 'block';
      var e_2 = 'none';
   }
   else {
      var e_1 = 'none';
      var e_2 = 'block';
   }
   
   document.getElementById('mf_1').style.display = e_2;
   document.getElementById('mf_2').style.display = e_1;
}