<!--

function changetab(tab)
{
	var num = tab.parentNode.id.match(/tab(\d)_(\d)/);
	for(var i=1;i<=3;i++)
	{
		var display, className;
		var classPrefix = num[1]==1?'l':'c';		if(num[2] == i)
		{			className = classPrefix+'_t_a';
			display = 'block';
		}
		else
		{
			display = 'none';
			className = i==3?'':classPrefix+'_t_a_1';
		}
		document.getElementById('content'+num[1]+'_'+i).style.display = display;
		document.getElementById('tab'+num[1]+'_'+i).className = className;
	}
}

-->