function attachcheckdisable(r,s,a)
{
	var ha = new Function("handlerules(this)");
	// r - run once
	// s - source object
	// a - arguments
	so = document.getElementById(s);
	if (!so._rules)
		so._rules = new Array();
	if (so)
	{
		so._rules.push({name: 'checkdisable', args: a });
		so.onclick = ha;
		if (r)
			eval('checkdisable(s,' + a + ');');
	}
}

function handlerules(o)
{
	l = o._rules.length;
	while (l--)
		eval(o._rules[l].name + '("' + o.id + '",' + o._rules[l].args + ');');
}

function checkdisable(s,t,b)
{
	// s - source element id (checkbox)
	// t - target element id to disable
	// b - boolean: true (disable t if s checked), false (disable t if s unchecked)
	so = document.getElementById(s);
 	to = document.getElementById(t);
 	if (so && to)
	{
		if (b == so.checked)
		{
			to.disabled = true;
			switch(to.type)
			{
				case 'text':
				case 'textarea':
				case 'password':
					to.className = 'dtext';
					break;
			};

		}
		else
		{
			to.disabled = false;
			switch(to.type)
			{
				case 'text':
				case 'textarea':
				case 'password':
					to.className = 'text';
					break;
			};
		}
	}
}