var colors = new Array('#ffff66','#a0ffff','#99ff99','#ff9999','#ff66ff');

function highlight(terms, container){
	var terms_split = terms.split(' ');
	var c = 0;
	for(var i=0; i<terms_split.length; i++){
		highlight_term(terms_split[i], container, colors[c]);
		c = (c == colors.length-1)?0:c+1;
	}
}

function highlight_term(term, container, color){
	var term_low = term.toLowerCase();

	for(var i=0; i<container.childNodes.length; i++){
		var node = container.childNodes[i];

		if (node.nodeType == 3){
			var data = node.data;
			var data_low = data.toLowerCase();
			if (data_low.indexOf(term_low) != -1){
				var new_node = document.createElement('SPAN');
				node.parentNode.replaceChild(new_node,node);
				var result;
				while((result = data_low.indexOf(term_low)) != -1){
					new_node.appendChild(document.createTextNode(data.substr(0,result)));
					new_node.appendChild(create_node(document.createTextNode(data.substr(result,term.length)),color));
					data = data.substr(result + term.length);
					data_low = data_low.substr(result + term.length);
				}
				new_node.appendChild(document.createTextNode(data));
			}
		}else{
			highlight_term(term, node, color);
		}
	}
}

function create_node(child, color){
	var node = document.createElement('SPAN');
	node.style.backgroundColor = color;
	node.style.color = '#000000';
	node.appendChild(child);
	return node;
}