function checkUncheckAll(theElement)    //Ezzel be es kijelolod az osszeset
{
     var theForm = theElement.form, ind = 0;
	 for(ind=0; ind<theForm.length;ind++)
	 {
      if(theForm[ind].type == 'checkbox' && theForm[ind].name != 'checkall')
      	{
	  	theForm[ind].checked = theElement.checked;
	  	}
     }
}

function checkall(checkbox)     //Ezzel csak bejelolod az osszeset, de ki nem lehet
{
	var elems =  checkbox.form.elements;
	for (var i = 0, n = elems.length; i < n; i++)
		{
		if(elems[i].type == 'checkbox') elems[i].checked = true;
		}
	checkbox.checked = false;
}
    
function invertcheck(checkbox)   //Ezzel megfordithatod
{
	var elems =  checkbox.form.elements;
	for (var i = 0, n = elems.length; i < n; i++)
		{
		if(elems[i].type == 'checkbox') elems[i].checked = ! elems[i].checked;
		}
	checkbox.checked = false;
}