var ton = window.parent.topFrame.getSwitch();
var ton_on =new Image();     
var ton_off=new Image();      

ton_on.src="images/but_tonan.jpg"; 
ton_off.src="images/but_tonaus.jpg";   

function setButton() {
	if(ton==1) { document.images.onoff.src=ton_off.src; }
	else { document.images.onoff.src=ton_on.src; }
}

function soundSwitch(){
	if(ton==1) { ton=0; document.images.onoff.src=ton_on.src; }
	else { ton=1; document.images.onoff.src=ton_off.src; }
	window.parent.topFrame.location.href='sound.php?switch='+ton;
	document.cookie = ton;	
}