function Suggest() {

	var pRequest;
	var pLayer;
	var pDebug					= true;
	var pInstanceName			= '';
	var pSearchURL				= '';
	var pQueryParamName			= '';
	var pFormname 				= '';
	var pLayerName				= '';
	var pQueryInput;
	var pSuggest				= new Array();
	var pLastQuery;
	var pCurrentSelection		= 0;
	var submitted				= false;

	var pSuggestQueryClass 		= 'suggestTextQuery';
	var pSuggestTypeClass 		= 'suggestTextType';
	var pSuggestAmountClass     = 'suggestTextAmount';
	var pSuggestQueryTypedClass = 'suggestTextQueryTyped';
	var pSuggestFooterClass     = 'suggestFooter';
	var pSuggestHeaderClass     = 'suggestHeader';
	var pSuggestRowClass	    = 'suggestRow';
	var pSuggestHighlightClass  = 'suggestHighlight';

	//headerText is the text that appears at the top of suggestions
	var headerText = 'Sugerencia';
	
	this.init = function(searchURL, formname, queryParamName, divLayername, instanceName, debugMode) {
		pSearchURL			= searchURL;
		pFormname			= formname;
		pQueryParamName		= queryParamName;
		pLayerName			= divLayername;
		pInstanceName		= instanceName;
 		pDebug				= debugMode;
		if (pSearchURL == '') {		
			if (pDebug) alert('no searchurl defined');
			return null;
		} else if (pInstanceName == '') {
			if (pDebug) alert('no instancename defined');
			return null;
		} else if (pFormname == '') {
			if (pDebug) alert('no formname defined');
			return null;
		} else if (pQueryParamName == '') {
			if (pDebug) alert('no queryparamname defined');
			return null;
		} else if (pLayerName == '') {
			if (pDebug) alert('need a layer for output');
		}
		pQueryInput = document[pFormname][pQueryParamName];
		pQueryInput.onkeyup	= handleKeyPress;
		pQueryInput.onfocus	= showLayer;
		pQueryInput.onblur	= hideLayer;
		document[pFormname].onsubmit = handleSubmit;
		onLoaded = false;
	}
	
	function handleSubmit() {
		submitted = true;
		if (pSuggest[pCurrentSelection] != undefined) {
			document[pFormname][pQueryParamName].value = pSuggest[pCurrentSelection].split('###')[0];
		}
	}
	
	this.handleClick = function() {
		if (pSuggest[pCurrentSelection] != undefined) {
			document[pFormname][pQueryParamName].value = pSuggest[pCurrentSelection].split('###')[0];
			document[pFormname].submit();
		}
	}
	
	this.handleMouseOver = function(pos) {
		var tblCell = getTableCell(pos);
		unmarkAll();
		if (tblCell != null) {
			highlightSuggest(tblCell);
			pCurrentSelection = pos;
		}
	}
	
	this.handleMouseOut = function(pos) {
		var tblCell = getTableCell(pos);
		if (tblCell != null) {
			unmarkSuggest(tblCell);
			pCurrentSelection = -1
		}
	}
	
	function handleKeyPress(evt) {
		evt = (evt) ? evt : ((event) ? event : null);
		var keyCode = evt.keyCode;
		
		if (keyCode == 38) {
			moveSelection('up')
		} else if (keyCode == 27) {	
			hideLayer();
		} else if (keyCode == 40) {
			onLoaded = false;
			moveSelection('down');
		} else {
			if (pQueryInput.value == '') {
				hideLayer();
				if (pLayer != null){ pLayer.innerHTML = ''; }
				return null;
			}
			if (!submitted && pLastQuery != pQueryInput.value){ startAjax(); }
			if (keyCode!=13) pLastQuery = pQueryInput.value;
		}
	}
	
	function moveSelection(direction) {
		var pos = pCurrentSelection;
		if (direction == 'up'){	pos--; }
		else{ 					pos += 1; }
		
		if (pos < 0) {
			unmarkAll();
			pQueryInput.focus();
			pCurrentSelection	= -1;
		} else {
			var tblCell = getTableCell(pos);
			if (tblCell != null) {
				unmarkAll();
				highlightSuggest(tblCell);
				pCurrentSelection = pos;
			}
		}
		
		var query = pQueryInput.value;
		pQueryInput.value = '';
		pQueryInput.focus();
		pQueryInput.value = query; 
	}
	
	function startAjax() {
		var query = pQueryInput.value;
		
		//var requestURL = pSearchURL +'?'+ pQueryParamName +'='+ escape(query);
		
		var requestURL = pSearchURL + "&query="+escape(query);
		//alert(requestURL);
		if(query.length>2)
		{
			try {
				if( window.XMLHttpRequest ) {
					pRequest = new XMLHttpRequest();
				} else if( window.ActiveXObject ) {
					pRequest = new ActiveXObject( "Microsoft.XMLHTTP" );
				} else {
					if (pDebug) alert( 'no ajax connection' );
				}
				
				pLayer = document.getElementById(pLayerName);
				if (pLayer != null) {
					if (query != '') {
	
						pRequest.open( "GET", requestURL, true );
						pRequest.onreadystatechange = callbackAjax;
						pRequest.send( null );
					} else {
						hideLayer();
					}
				} else {
					if (pDebug) alert( 'no layer for output found' );
				}
			} catch( ex ) {
				hideLayer();
				if (ex == undefined) {
					if (pDebug) alert( 'Error: ' + ex.getmessage );
				} else {
					if (pDebug) alert( 'Error: ' + ex );
				}
			}
		}
	}
	
	function hideLayer() {
		if (pLayer != null) {
			pLayer.style.display = 'none';
			fireSuggestLayerHidden();
		}
	}
	
	this.hideLayerOutsideCall = function() {
		if (pLayer != null) {
			pLayer.style.display = 'none';
			fireSuggestLayerHidden();
		}
	}
	
	function showLayer() {
		if (pLayer != null && pSuggest != null && pSuggest.length >= 1) {
			pLayer.style.display = 'block';
			pLayer.style.visibility = 'visible';
		}
	}
	
	function callbackAjax() {
		if (submitted == false) {
			if (pRequest.readyState == 4) {
				if (pRequest.status != 200) {
					hideLayer();
					if (pDebug) alert( 'Error (' + pRequest.status + '): ' + pRequest.statusText );
				} else {
					handleResponse(pRequest.responseText);
				}
			}
		}
  }

	// calls the callback for "outside" listeners if the callback is implemented
	function fireSuggestCompleted(suggestLayerIsVisible) {
		if (typeof(onSuggestCompleted) == 'function') {
			onSuggestCompleted(suggestLayerIsVisible);
		}
	}
	
	// calls the callback for "outside" listeners if the callback is implemented
	function fireSuggestLayerHidden() {
		if (typeof(onSuggestLayerHidden) == 'function') {
			onSuggestLayerHidden();
		}
	}

	function handleResponse(text) {
		pCurrentSelection = -1;
		pSuggest = new Array();
		
		/*
		text = text.replace(/brand/g, brand)
		text = text.replace(/category/g, category);
		text = text.replace(/content/g, content);	
		text = text.replace(/search term/g, searchTerm);	
		text = text.replace(/productname/g, productName);	
		text = text.replace(/Products/g, products);		
		text = text.replace(/One Product/g, oneProduct);		
		*/
		
		pSuggest = text.split('\n');
		
		//var outputText = text;
		
		
		var outputText = '<table cellpadding="3" cellspacing="1" class="' + pLayerName + '" width="100%" border="0" onMouseDown="' + pInstanceName + '.handleClick();">';
		outputText += '<tr class="'+pSuggestHeaderClass+'" ><td nowrap="nowrap" colspan="3">'+headerText+'</td></tr>';
		
		var pNewSuggest = new Array();
		for (var i in pSuggest) {
			try
			{
				var firstChar = pSuggest[i].charCodeAt(0);
				if (firstChar != 13 && firstChar != 10 && pSuggest[i].length >= 1) {
					pNewSuggest.push(pSuggest[i]);
				}
			}
			catch(ex)
			{
			}
		}
		pSuggest = pNewSuggest;
		var query = pQueryInput.value;
		for (var i in pSuggest) {
			try
			{
				pSuggestParts = new Array();
				pSuggestParts = pSuggest[i].split("###");
	
				outputText += '<tr id="' + pLayerName + '_' + i + '" class="'+pSuggestRowClass+'" onMouseOver="' + pInstanceName + '.handleMouseOver(' + i + ');" onMouseOut="' + pInstanceName + '.handleMouseOut(' + i + ');">'
									+'<td nowrap="nowrap" class="'+ pSuggestQueryClass +'">' + pSuggestParts[0].replace(new RegExp("("+query+")","ig"),'<span class="'+pSuggestQueryTypedClass+'">$1</span>') + '</td>'
									+'<td nowrap="nowrap" class="'+ pSuggestTypeClass +'">' + pSuggestParts[1] + '</td>'
							+'</tr>';
				//+'<td nowrap="nowrap" class="'+ pSuggestAmountClass +'">' + pSuggestParts[2] + '</td>'
			}
			catch(ex)
			{
			}
		}
		outputText += '</table>';
		
		
		if (pSuggest.length >= 1) {
			showLayer();
			pLayer.innerHTML = '';
			
			var newdiv = document.createElement("div");
			newdiv.innerHTML = outputText;
			pLayer.appendChild(newdiv);
		
			// calback for "outside" listeners
			fireSuggestCompleted(true);
		} else {
			hideLayer();
			pLayer.innerHTML = '';
			// calback for "outside" listeners
			fireSuggestCompleted(false);
		}
		
	}
	
	function highlightSuggest(tblCell) {
		tblCell.className = pSuggestHighlightClass; 
	}
	
	function unmarkSuggest(tblCell) {
		tblCell.className = pSuggestRowClass; 
	}
	
	function unmarkAll() {
		var tblCell;
		for (var i in pSuggest) {
			tblCell = getTableCell(i);
			if (tblCell != null) {
				unmarkSuggest(tblCell);
			}
		}
	}
	
	function getTableCell(pos) {
		var tblCell;
		tblCell = document.getElementById(pLayerName + '_' + pos);
		return tblCell;
	}
}