function toggleCheckboxDependencies(checkboxObj) {
	for (i = 1; i < arguments.length; i++) {
		element = document.getElementById(arguments[i]);
		element.disabled = !element.disabled;
    }
}

function disableFields(flag) {
	for(i = 0; i < arguments.length; i++) {
		element = document.getElementById(arguments[i]);
		element.disabled = flag;
	}
}

/* 
 * Submits searchform to page action. This is used on tabs and links that
 * change searchform mode from basic to extended and back.
 */ 
function submitSearchform(action) {
	//the fact that searchform has field area_selection_mode that has value 'list'
	//indicates that we are submitting in order to change area selection mode. In that case 
	//we must remove map selection parameters.
	if(document.searchform.area_selection_mode && 
	   document.searchform.area_selection_mode.value == 'list') {
		if(document.getElementById('location_start_lat')) {
			document.getElementById('location_start_lat').value='';
		}
		if(document.getElementById('location_start_lon')) {
			document.getElementById('location_start_lon').value='';
		}
		if(document.getElementById('location_end_lat')) {
			document.getElementById('location_end_lat').value='';
		}
		if(document.getElementById('location_end_lon')) {
			document.getElementById('location_end_lon').value='';
		}
		if(document.getElementById('location_center_lat')) {
			document.getElementById('location_center_lat').value='';
		}
		if(document.getElementById('location_center_lon')) {
			document.getElementById('location_center_lon').value='';
		}
		if(document.getElementById('location_scale')) {
			document.getElementById('location_scale').value='';
		}
	}
	//Just in case someone has changed target of the form (counter)
	document.forms['searchform'].target = '_self';	
	document.forms['searchform'].action = action;
	document.forms['searchform'].submit();
	
}

/*
 * Show success message
 */
function showSuccess() {
	var element;
	element = document.getElementById('success');
	if(element) {
		if(element.style.visibility) {
			element.style['visibility'] = 'visible';
		}
	}
}

/*
 * Hides failure message
 */
function hideFailure() {
	var element;
	if(document.getElementById) {
		element = document.getElementById('failure');
		if(element) {
			if(element.style) {
				element.style['visibility'] = 'hidden';
			}
		}
	}
}