var checked = new Image();
var unchecked = new Image();
checked.src = '/img/checked.gif';
unchecked.src = '/img/nochecked.gif';

function SwitchImage(obj)
{
    if(obj.className == "opros_item_checked")
    {
    }
    else
    {
	var a = document.getElementById('opros');
	var s = a.getElementsByTagName('div');
	for(var i in s)
	{
	    if(s[i].className == "opros_item_checked")
		s[i].className = "opros_item";
	}
	obj.className = "opros_item_checked";
    }
    document.getElementById('opros_value').value = obj.id;
}