document.execCommand("BackgroundImageCache", false, true);

function to_do(f_value){
	if(confirm(f_value))
	return true
	else
	return false;
}

function to_do_1(f_value,f_value1,f_value2){
	if(confirm(f_value))
	{
		window.open(f_value1,f_value2,'');
	}
	else
	return false;
}

function to_s(f_value,f_value1,f_value2,f_value3){
	if (f_value)
	{
		if(confirm(f_value))
		{
			document.getElementById(f_value3).action = f_value1;
			if (f_value2) document.getElementById(f_value3).target = f_value2;
			document.getElementById(f_value3).submit();
		}
		else
		return false;
	}
	else
	{
		document.getElementById(f_value3).action = f_value1;
		if (f_value2) document.getElementById(f_value3).target = f_value2;
		document.getElementById(f_value3).submit();
	}
}

function hide_d(f_value){
	if (!f_value) f_value = 'none';
	var a = document.getElementById('div_o1');
	var b = document.getElementById('div_o2');
	var c = document.getElementById('f_o1');
	a.style.display = f_value;
	b.style.display = f_value;
	c.style.display = f_value;
}

function goto_d(f_id){
	if (f_id)
	{
		window.open('s.php?id='+f_id,'show_div','');
	}
}

function s_div(f_id,f_amount){
	var a = document.getElementById("div_" + f_id);
	var b = document.getElementById("div_a" + f_id);
	for (i = 1; i <= f_amount; i++)
	{
		document.getElementById("div_" + i).style.display = "none";
		document.getElementById("div_a" + i).className = "bg_png_but_off t_center"
	}
	a.style.display = "";
	b.className = "bg_png_but_on t_center"
}

<!-- Hide
function killErrors() {
  return true;
}
   window.onerror = killErrors;
// -->