function hide_all_subs()
{
	document.getElementById("sub1").style.display = "none";
	document.getElementById("sub2").style.display = "none";
	document.getElementById("sub3").style.display = "none";
	document.getElementById("sub4").style.display = "none";
	document.getElementById("sub5").style.display = "none";
	document.getElementById("sub6").style.display = "none";
}

function show_this_sub(which_one)
{
	hide_all_subs();
	document.getElementById("sub" + which_one).style.display = "block";
}

function over_image(arg1,arg2)
{
	if(document.images)
	{
		document[arg1].src = eval(arg2 + ".src");
	}
}

/*
var myrules = {
	'#nav_href1' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav1', 'nav1_on');
		}
	},
	'#nav1' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav1', 'nav1_off');
		}
	},
	'#nav_href2' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav2', 'nav2_on');
		}
	},
	'#nav2' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav2', 'nav2_off');
		}
	},
	'#nav_href3' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav3', 'nav3_on');
		}
	},
	'#nav3' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav3', 'nav3_off');
		}
	},
	'#nav_href4' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav4', 'nav4_on');
		}
	},
	'#nav4' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav4', 'nav4_off');
		}
	},
	'#nav_href5' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav5', 'nav5_on');
		}
	},
	'#nav5' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav5', 'nav5_off');
		}
	},
	'#nav_href6' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav6', 'nav6_on');
		}
	},
	'#nav6' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav6', 'nav6_off');
		}
	},
	'#nav_href7' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav7', 'nav7_on');
		}
	},
	'#nav7' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav7', 'nav7_off');
		}
	},
	'#nav_href8' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav8', 'nav8_on');
		}
	},
	'#nav8' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav8', 'nav8_off');
		}
	},
	'#nav_href9' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav9', 'nav9_on');
		}
	},
	'#nav9' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav9', 'nav9_off');
		}
	},
	'#nav_href10' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav10', 'nav10_on');
		}
	},
	'#nav10' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav10', 'nav10_off');
		}
	},
	'#nav_href11' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav11', 'nav11_on');
		}
	},
	'#nav11' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav11', 'nav11_off');
		}
	},
	'#nav_href12' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav12', 'nav12_on');
		}
	},
	'#nav12' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav12', 'nav12_off');
		}
	},
	'#nav_href13' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav13', 'nav13_on');
		}
	},
	'#nav13' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav13', 'nav13_off');
		}
	},
	'#nav_href14' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav14', 'nav14_on');
		}
	},
	'#nav14' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav14', 'nav14_off');
		}
	},
	'#nav_href15' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav15', 'nav15_on');
		}
	},
	'#nav15' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav15', 'nav15_off');
		}
	},
	'#nav_href16' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav16', 'nav16_on');
		}
	},
	'#nav16' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav16', 'nav16_off');
		}
	},
	'#nav_href17' : function(element)
	{
		element.onmouseover = function()
		{
			over_image('nav17', 'nav17_on');
		}
	},
	'#nav17' : function(element)
	{
		element.onmouseout = function()
		{
			over_image('nav17', 'nav17_off');
		}
	}
};
	
Behaviour.register(myrules);
*/