function hidediv(div_id) { 
	if (document.getElementById) { // DOM3 = IE5, NS6 
		document.getElementById(div_id).style.visibility = 'hidden'; 
		document.getElementById(div_id).style.display = 'none'; 
	} 
	else { 
		if (document.layers) { // Netscape 4 
			document.hideShow.visibility = 'hidden'; 
		} 
		else { // IE 4 
			document.all.hideShow.style.visibility = 'hidden'; 
		} 
	} 
} 

function showdiv(div_id) { 
	if (document.getElementById) { // DOM3 = IE5, NS6 
		document.getElementById(div_id).style.visibility = 'visible'; 
		document.getElementById(div_id).style.display = ''; 
	} 
	else { 
		if (document.layers) { // Netscape 4 
			document.hideShow.visibility = 'visible'; 
		} 
		else { // IE 4 
			document.all.hideShow.style.visibility = 'visible'; 
		} 
	} 
}

function changeText(div_id, to_text){
	document.getElementById(div_id).innerHTML = to_text;
}

function check_hidediv(div_id) { 
	var	theText = document.getElementById(div_id).innerHTML;
	if(theText=='-'){
		return true;
	}	// end if

}