/*
	* if the field is empty
	*/
	function required(field_id,msg_disp_id,msg)
	{
		document.getElementById(msg_disp_id).innerHTML='<span color="red">'+msg+'</span>';
		document.getElementById(field_id).focus();
		document.getElementById(field_id).style.backgroundColor="#f9f9ac";
		return false;
	}

	//--------------------------------------------------------------------
	
	/*
	* Check field for a particular condition
	*/
	function match(field_id,msg_disp_id,msg,match_id)
	{
		if(!(match_id.test(document.getElementById(field_id).value)))
		{
		document.getElementById(msg_disp_id).innerHTML='<span color="red">'+msg+'</span>';
		document.getElementById(field_id).focus();
		document.getElementById(field_id).style.backgroundColor="#f9f9ac";
		return false;
		}	
	}
	//------------------------------------------------------------------------
	
	/*
	* Display message
	*/
	function bg(field_id,msg_disp_id)
	{
		document.getElementById(field_id).style.backgroundColor="#ffffff";
		document.getElementById(msg_disp_id).innerHTML="";	
	}
	//------------------------------------------------------------------------
	
	/*
	* Confirmatio on delete
	*/
	
	function del()
	{
		if(confirm('Are you sure you want to delete?'))
		{
		return true;
		}
		else
		{
		return false;
		}	
	}
	//------------------------------------------------------------------------
	
	/*
	* reassign the work of one teacher to another teacher
	*/