/**
* Div show / hide - SURF portal
* 
*/

function isObject(id) {
	return typeof(id) == 'object';
}

function showDiv(div_id) 
{
	el = document.getElementById(div_id);
	if(isObject(el)) {
		el.style.display = 'block';
	}
}

function hideDiv(div_id)
{
	el = document.getElementById(div_id);
	if(isObject(el)) {
		el.style.display = 'none';
	}
}