function chcolor(el_id, act)
{
	var el1=document.getElementById(el_id);
	var el2=document.getElementById(el_id+'a');
	var el3=document.getElementById(el_id+'b');
	if (act==1)
	{
		el1.className += " sm";
		el2.className=el2.className.replace('ms0','ms1');
		el3.className=el3.className.replace('msa0','msa1');
	}
	else if (act==2)
	{
		el1.className=el1.className.replace('sm','');
		el2.className=el2.className.replace('ms1','ms0');
		el3.className=el3.className.replace('msa1','msa0');
	}
	else if (act==3)
	{
		el2.className=el2.className.replace('ms2','ms1');
		el3.className=el3.className.replace('msa2','msa1');
	}
	else if (act==4)
	{
		el2.className=el2.className.replace('ms1','ms2');
		el3.className=el3.className.replace('msa1','msa2');
	}
}

function _volume_preload ()
{
	m2_off=new Image();
	m2_off.src = "des/m2.gif";
	m2_on=new Image();
	m2_on.src = "des/m2a.gif";
	m3_off=new Image();
	m3_off.src = "des/m3.gif";
	m3_on=new Image();
	m3_on.src = "des/m3a.gif";
	m4_off=new Image();
	m4_off.src = "des/m4.gif";
	m4_on=new Image();
	m4_on.src = "des/m4a.gif";
	m5_off=new Image();
	m5_off.src = "des/m5.gif";
	m5_on=new Image();
	m5_on.src = "des/m5a.gif";
	m6_off=new Image();
	m6_off.src = "des/m6.gif";
	m6_on=new Image();
	m6_on.src = "des/m6a.gif";
	b1_off=new Image();
	b1_off.src = "des/b1.gif";
	b1_on=new Image();
	b1_on.src = "des/b1h.gif";
	b2_off=new Image();
	b2_off.src = "des/b2.gif";
	b2_on=new Image();
	b2_on.src = "des/b2h.gif";
	b3_off=new Image();
	b3_off.src = "des/b3.gif";
	b3_on=new Image();
	b3_on.src = "des/b3h.gif";
}

function chimg(img_id, state)
{
	if (state==1)
	{
		if (document.all) { eval ('document["' + img_id + '"].src = ' + img_id + '_on.src;'); }
		else { eval ('document.images["' + img_id + '"].src = ' + img_id + '_on.src;'); }
	}
	else
	{
		if (document.all) { eval ('document["' + img_id + '"].src = ' + img_id + '_off.src;'); }
		else { eval ('document.images["' + img_id + '"].src = ' + img_id + '_off.src;'); }
	}
}

_volume_preload ();