function HideDiv(ID,TAB){
	document.getElementById(ID).style.display='none';
	document.getElementById(TAB).className = 'tab_off';
}
		
function ShowDiv(ID,TAB){
	document.getElementById(ID).style.display='block';
	document.getElementById(TAB).className = 'tab_on';
}

function ShowHideTabs(ID){
	if(ID=='spot_focus'){
		ShowDiv(ID,'sit');
		HideDiv('stats','sts');
		HideDiv('forecast','pre');
		HideDiv('error','error');
	}
	if(ID=='stats'){
		ShowDiv(ID,'sts');
		HideDiv('spot_focus','sit');
		HideDiv('forecast','pre');
		HideDiv('error','error');
	}
	if(ID=='forecast'){
		ShowDiv(ID,'pre');
		HideDiv('spot_focus','sit');
		HideDiv('stats','sts');
		HideDiv('error','error');
	}
	if(ID=='error'){
		HideDiv('spot_focus','sit');
		HideDiv('stats','sts');
		HideDiv('forecast','pre');
		ShowDiv(ID,'error');
	}
}