function popUp(url, width, height, left, top, toolbar) 
{
	var intWidth=568;
	var intHeight=400;
	var intLeft=30;
	var intTop=45;
	var intTool=0;
	if(width > 0) intWidth = width;
	if(height > 0) intHeight = height;
	if(left > 0) intLeft = left;
	if(top > 0) intTop = top;
	if(toolbar < 2) intTool = toolbar;
	var winPopUp = window.open(url,'popup','width=' + intWidth + ',height=' + intHeight + ',left=' + intLeft + ',top=' + intTop + ',toolbar=' + intTool + ',scrollbars=1,resizable=1');
	if(typeof window.focus != 'undefined') javascript: winPopUp.focus();
}

function showDiv(id)
{
	var el = $(id);
	el.style.display = "block";
}

function hideDiv(id)
{
	var el = $(id);
	el.style.display = "none";
}

function searchTeacher()
{
	var ln = $F('txtLastName');
	if(ln.length < 2)
	{
		alert("Please enter a minimum of 2 letters to search.");
		return;
	}
	
	var url = "/services/search.php";
	var pars = "lastName=" + ln;

	var myAjax = new Ajax.Updater(
		$('searchResults'),
		url,
		{
			method: 'post',
			parameters: pars,
			onFailure: onError
		});
}  

function onError()
{
	alert ("Error: " + result.responseText);
}