<!--
function hide_elements(elementids){
	var elems=new Array();
	elems=elementids.split(',');
	var len = elems.length;
	for(i=0;i<len;i++){
		element = document.getElementById(elems[i]);
		element.style.display = 'none';
	};
};
function show_elements(elementids){
	var elems=new Array();
	elems=elementids.split(',');
	var len = elems.length;
	for(i=0;i<len;i++){
		element = document.getElementById(elems[i]);
		element.style.display = 'block';
	};
};
-->