var arrUiAjax=new Array();
var indexUiAjax=0;

// just in case
function insertAfter( referenceNode, newNode ) {
    referenceNode.parentNode.insertBefore( newNode, referenceNode.nextSibling );
}

// removes control characters from strings
function removeNL(s){ 
  return s.replace(/[\n\r\t]/g,""); 
}

var search_ajax=new sack();
var searchTimerID = null; 
var searchTimerOn = false; 
var activeSearchObject=null;
var timecount = 2000; // Change this to the time delay that you desire 

function startTime_search() {
	if (searchTimerOn == false) {
		searchTimerID=setTimeout( "hideSearchBox('search_box_dropdown')" , timecount);
		searchTimerOn = true;
	}
} 

function hideSearchBox(objid) {
	document.getElementById(objid).style.display="none";
}

function showSearchBox(objid) {
	document.getElementById(objid).style.display="block";
}

function stopTime_search() {
	if (searchTimerOn) {
		clearTimeout(searchTimerID);
		searchTimerID = null;
		searchTimerOn = false;
	}
}

//because every change function on this page references the same section of the page, we can use the same function
// to change the actual html goodies.

function stateChanged_search(index) {
	if (arrUiAjax[index].response != "notext") {
		showSearchBox('search_box_dropdown');
	}
	else {
		hideSearchBox('search_box_dropdown');
	}
	arrUiAjax[index]=null;
}

function ajaxError() {
	alert("There was an error retrieving the list of search results.  Please try again");
}

// works every time the text box is changed
function updateSearch_search(obj_id, table, col) {
	var index=indexUiAjax;
	indexUiAjax++;
	arrUiAjax[index]=new sack();

	// the php page uses "if(isset())" to check for the various operations
	activeSearchObject=document.getElementById(obj_id);
	var searchtext=activeSearchObject.value;
	var searchDropBox=document.getElementById('search_box_dropdown');
	searchDropBox.style.width=activeSearchObject.offsetWidth + "px";
	searchDropBox.style.left=getLeftPos(activeSearchObject, searchDropBox.parentNode) + "px";
	searchDropBox.style.top=getTopPos(activeSearchObject, searchDropBox.parentNode) + activeSearchObject.offsetHeight + "px";

	
	arrUiAjax[index].setVar("search",searchtext);
	arrUiAjax[index].setVar('table',table);
	arrUiAjax[index].setVar('col',col);
	arrUiAjax[index].setVar('index',index);
	arrUiAjax[index].requestFile='http://n4a.solacedev.com/tools/ui_dropdown_search/bin/ajaxResponder.php';
	arrUiAjax[index].element='search_box_dropdown';
	arrUiAjax[index].method="GET";
	arrUiAjax[index].onCompletion=function(){stateChanged_search(index);};
	arrUiAjax[index].onError=ajaxError;
	arrUiAjax[index].runAJAX();
}

// gets the top position of the search text box up to the parent of the dropdown box
function getTopPos(inputObj, stopObj) {
  var returnValue = inputObj.offsetTop;
  while((inputObj = inputObj.offsetParent) != null) {
  	returnValue += inputObj.offsetTop;
  	if (inputObj == stopObj) break;
  }
  return returnValue;
}

// gets the left position of the search box up to the parent of the dropdown box
function getLeftPos(inputObj, stopObj) {
  var returnValue = inputObj.offsetLeft;
  while((inputObj = inputObj.offsetParent) != null) {
  	returnValue += inputObj.offsetLeft;
  	if (inputObj == stopObj) break;
  }
  return returnValue;
}