function clearText(thefield){
	if (thefield.defaultValue==thefield.value)
	thefield.value = ""
}


function xChange(imageName, newState) {
	if (document.images) {
		if (newState == "over")
		document.images[imageName].src = overImage[imageName].src
		else
		document.images[imageName].src = offImage[imageName].src
		}
}


function popUp(URL, x, y) {
	var myWin = window.open(URL,myWin, "resizable=yes,scrollbars=yes,height=" + y + ",width=" + x);
}


if (document.images) {
	overImage = new Array()
	overImage['about'] = new Image()
	overImage['about'].src = "/images/nav/about_over.gif"
	overImage['this_year'] = new Image()
	overImage['this_year'].src = "/images/nav/thisyear_over.gif"
	overImage['scrapbook'] = new Image()
	overImage['scrapbook'].src = "/images/nav/scrapbook_over.gif"
	overImage['get_involved'] = new Image()
	overImage['get_involved'].src = "/images/nav/getinvolved_over.gif"
	overImage['citysteppers'] = new Image()
	overImage['citysteppers'].src = "/images/nav/citysteppers_over.gif"
	overImage['parents_teachers'] = new Image()
	overImage['parents_teachers'].src = "/images/nav/parentsteachers_over.gif"
	overImage['alumni'] = new Image()
	overImage['alumni'].src = "/images/nav/alumni_over.gif"

	overImage['topnav_101'] = new Image()
	overImage['topnav_101'].src = "/images/nav/topnav_101_over.gif"
	overImage['topnav_102'] = new Image()
	overImage['topnav_102'].src = "/images/nav/topnav_102_over.gif"
	overImage['topnav_103'] = new Image()
	overImage['topnav_103'].src = "/images/nav/topnav_103_over.gif"
	overImage['topnav_104'] = new Image()
	overImage['topnav_104'].src = "/images/nav/topnav_104_over.gif"
	overImage['topnav_105'] = new Image()
	overImage['topnav_105'].src = "/images/nav/topnav_105_over.gif"
	overImage['topnav_106'] = new Image()
	overImage['topnav_106'].src = "/images/nav/topnav_106_over.gif"
	overImage['topnav_107'] = new Image()
	overImage['topnav_107'].src = "/images/nav/topnav_107_over.gif"

	
	offImage = new Array()
	offImage['about'] = new Image()
	offImage['about'].src = "/images/nav/about_off.gif"
	offImage['this_year'] = new Image()
	offImage['this_year'].src = "/images/nav/thisyear_off.gif"
	offImage['scrapbook'] = new Image()
	offImage['scrapbook'].src = "/images/nav/scrapbook_off.gif"
	offImage['get_involved'] = new Image()
	offImage['get_involved'].src = "/images/nav/getinvolved_off.gif"
	offImage['citysteppers'] = new Image()
	offImage['citysteppers'].src = "/images/nav/citysteppers_off.gif"
	offImage['parents_teachers'] = new Image()
	offImage['parents_teachers'].src = "/images/nav/parentsteachers_off.gif"
	offImage['alumni'] = new Image()
	offImage['alumni'].src = "/images/nav/alumni_off.gif"

	offImage['topnav_101'] = new Image()
	offImage['topnav_101'].src = "/images/nav/topnav_101_off.gif"
	offImage['topnav_102'] = new Image()
	offImage['topnav_102'].src = "/images/nav/topnav_102_off.gif"
	offImage['topnav_103'] = new Image()
	offImage['topnav_103'].src = "/images/nav/topnav_103_off.gif"
	offImage['topnav_104'] = new Image()
	offImage['topnav_104'].src = "/images/nav/topnav_104_off.gif"
	offImage['topnav_105'] = new Image()
	offImage['topnav_105'].src = "/images/nav/topnav_105_off.gif"
	offImage['topnav_106'] = new Image()
	offImage['topnav_106'].src = "/images/nav/topnav_106_off.gif"
	offImage['topnav_107'] = new Image()
	offImage['topnav_107'].src = "/images/nav/topnav_107_off.gif"
}

function IsEmpty(aTextField) {
	if ((aTextField.value.length==0) || (aTextField.value==null))
	{
		return true;
	}
		else 
	{ 
		return false;
	}
}	

function ValidateForm(form)
{

	if(IsEmpty(form.author)) 
	{ 
		alert('Please enter in your name');
		form.author.focus(); 
		return false; 
	} 
  
	var expression=/^([a-zA-Z0-9\-\._]+)@(([a-zA-Z0-9\-_]+\.)+)([a-z]{2,3})$/;
	if(!(expression.test(form.email.value)) )
	{
		alert("Please enter in a valid e-mail address");
		form.email.select();
		form.email.focus();
		return false;
	}
  
	if(IsEmpty(form.comment)) 
	{ 
		alert('Please enter in some comments');
		form.comment.focus(); 
		return false; 
	}
   
return true;
}