function setcbimg(element)
{
	var v = 1 - new Number(element.value);
	var z = new Image(); 
	if(v)
		z.src = "img/common/form-check-2.png"
	else	
		z.src = "img/common/form-check-1.png"
	element.style.backgroundImage="url(" + z.src + ")";	
	element.value=v;
}