function checkbox_check_set (id,value) {
	var real_obj=document.getElementById(id);
	var fake_obj=document.getElementById('fake_'+id);
 
	fake_obj.className='checkbox_'+value;
	real_obj.value=value;
}

function checkbox_check (id) {
	var real_obj=document.getElementById(id);
	var fake_obj=document.getElementById('fake_'+id);
		
	var _01=0;
	if (real_obj.value=='0') {_01=1;}
 
	fake_obj.className='checkbox_'+_01;
	real_obj.value=_01;
}

function checkbox_radio (id,op) {
	var real_obj=document.getElementById(id);
	var fake_old=document.getElementById('fake_'+id+'_'+real_obj.value);
	var fake_new=document.getElementById('fake_'+id+'_'+op);

	fake_old.className='checkbox_0';
	fake_new.className='checkbox_1';
	real_obj.value=op;
}