var state = 'none';
function showhide(layer_ref) {
	if (state == 'block') {
		state = 'none';
	}
	else {
		state = 'block';
	}
	if (document.all) { //IS IE 4 or 5 (or 6 beta)
		eval( "document.all." + layer_ref + ".style.display = state");
	}
	if (document.layers) { //IS NETSCAPE 4 or below
		document.layers[layer_ref].display = state;
	}
	if (document.getElementById && !document.all) {
		gordonmac = document.getElementById(layer_ref);
		gordonmac.style.display = state;
	}
}

// Courtesy of Project Seven Development. (http://www.projectseven.com)
function P7_rowLite(tb,cl){ //v1.0 by PVII -table row highlighter
 var g,i,x,gr;if(document.getElementById){g=document.getElementsByTagName("TABLE");
 for(x=0;x<g.length;x++){if(g[x].className&&g[x].className==tb){
 gr=g[x].getElementsByTagName("TR");if(gr){for(i=0;i<gr.length;i++){
 if(i>0){gr[i].onmouseover=function(){this.className=cl;};
 gr[i].onmouseout=function(){this.className='';};}}}}}}
}

/* http://www.kryogenix.org/code/browser/searchhi/ */
/* Modified 20021006 to fix query string parsing and add case insensitivity */
function highlightWord(node,word) {
	// 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);
		}
	}
	
	// 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;
			if (pn.className != "searchword") {
				// word has not already been highlighted!
				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("span");
				hiword.className = "searchword";
				hiword.appendChild(hiwordtext);
				pn.insertBefore(before,node);
				pn.insertBefore(hiword,node);
				pn.insertBefore(after,node);
				pn.removeChild(node);
			}
		}
	}
}

function googleSearchHighlight() {
	if (!document.createElement) return;
	ref = document.referrer;
	if (ref.indexOf('?') == -1) return;
	qs = ref.substr(ref.indexOf('?')+1);
	qsa = qs.split('&');
	for (i=0;i<qsa.length;i++) {
		qsip = qsa[i].split('=');
	        if (qsip.length == 1) continue;
        	if (qsip[0] == 'q' || qsip[0] == 'p') { // q= for Google, p= for Yahoo
			words = unescape(qsip[1].replace(/\+/g,' ')).split(/\s+/);
	                for (w=0;w<words.length;w++) {
				highlightWord(document.getElementsByTagName("body")[0],words[w]);
                	}
	        }
	}
}

window.onload = googleSearchHighlight;