function imgRollOver(id)
{
	var id_off = id + '_off';
	var id_on = id + '_on';
	
	document.getElementById(id_off).style.display = 'none';
	document.getElementById(id_on).style.display = 'block';
}

function imgRollOut(id)
{
	var id_off = id + '_off';
	var id_on = id + '_on';
	
	document.getElementById(id_on).style.display = 'none';
	document.getElementById(id_off).style.display = 'block';
}

function frmSubmit(frm)
{
	if(frm == 'frmContact')
	{
		if(emptyField(document.frmContact.first_name)) { alert("You must enter a first name"); return false; }
		else if(emptyField(document.frmContact.last_name)) { alert("You must enter a last name"); return false; }
		else if(!validZip(document.frmContact.zip.value)) { alert("You must enter a valid zip code"); return false; }
		else if(!validEmail(document.frmContact.email.value)) { alert("You must enter a valid email"); return false; }
		else 
		{
			document.frmContact.submitBTN.disabled = true;
			return true;
		}
	}
	else if(frm == 'frmNewsletter')
	{
		if(emptyField(document.frmNewsletter.first_name)) { alert("You must enter a first name"); return false; }
		else if(emptyField(document.frmNewsletter.last_name)) { alert("You must enter a last name"); return false; }
		else if(!validZip(document.frmNewsletter.zip.value)) { alert("You must enter a valid zip code"); return false; }
		else if(!validEmail(document.frmNewsletter.email.value)) { alert("You must enter a valid email"); return false; }
		else 
		{
			document.frmNewsletter.submitBTN.disabled = true;
			return true;
		}
	}
	else if(frm == 'frmClient')
	{
		if(emptyField(document.frmClient.client_name)) { alert("You must enter a client name"); return false; }
		else if(emptyField(document.frmClient.client_login)) { alert("You must enter a login"); return false; }
		else if(emptyField(document.frmClient.client_password)) { alert("You must enter a password"); return false; }
		else 
		{
			document.frmClient.submitBTN.disabled = true;
			return true;
		}
	}	
	else if(frm == 'frmProject')
	{
		if(emptyField(document.frmProject.project_name)) { alert("You must enter a project name"); return false; }
		else 
		{
			document.frmProject.submitBTN.disabled = true;
			return true;
		}
	}			
	else
		return false;
}