function tabClick(action)
{
	if(navigator.appName=='Netscape')
	{
		document.getElementById('web').style.fontWeight = 'normal';
		document.getElementById('images').style.fontWeight = 'normal';
		document.getElementById('video').style.fontWeight = 'normal';
		document.getElementById(action).style.fontWeight = 'bold';
		
		document.getElementById('header_action').value = action;
	}
	else
	{
		document.all['web'].style.fontWeight = 'normal';
		document.all['images'].style.fontWeight = 'normal';
		document.all['video'].style.fontWeight = 'normal';
		document.all[action].style.fontWeight = 'bold';

		document.all['header_action'].value = action;
	}
}

function sumbit_search()
{
	(navigator.appName=='Netscape') ? document.getElementById('header_searchform').submit() : document.all['header_searchform'].submit();
}