function $(objectId)
{
	if (document.getElementById && document.getElementById(objectId))
	{
		return document.getElementById(objectId);
	}else if (document.all && document.all[objectId])
	{
		return document.all[objectId];
	}else if (document.layers && document.layers[objectId])
	{
		return document.layers[objectId];
	}else{
		return false;
	}
}
function tabChange(objectId)
{
	var dts = $(objectId).getElementsByTagName('dt'); 
	var dds = $(objectId).getElementsByTagName('dd'); 
	var pp = 0;
	var aryName = ["one","two","three","four"];
	for(var i = 0; i < dts.length; ++i)
	{
		if(i == 0)
		{
			dts[i].className = aryName[0] + ' on';
			dds[i].className = 'wrapClear' + '';
		}
		(
			function()
			{
				var p = i;
				dts[p].onmouseover = function()
				{
					if (p != pp)
					{
						dts[p].className =aryName[p] + ' on';
						dts[pp].className =aryName[pp] + '';
						dds[p].className = 'wrapClear';
						dds[pp].className = 'wrapClear' + ' dpN';
					}
					pp = p;
					return false;
				}
			}
		)();
	}
}
window.onload = function()
{
	tabChange('tab_01');
}