function chk_all(d)
{
	var f = document.form1;
	for(var i = 0; i < f.elements.length; i++)
	{
		if( f.elements[i].type=='checkbox')
			f.elements[i].checked = d;
	}
}
function chk_del(d, titled, qty)
{
	if (qty=="1")
		return confirm("Delete this selected " + titled + "?\n\nNote: All information related to the " + titled + " also delete!\n\nDelete?");
	has_checked=0;
	for(var i = 0; i < d.elements.length; i ++)
	{
		if(d.elements[i].type=='checkbox')
		{	
			if (d.elements[i].checked==1)
				has_checked=1;
		}
	}
	if (has_checked==0)
	{
		alert("Select at least one " + titled + " for delete...");
		return false;
	}
	else
		return confirm("Delete all selected " + titled + "?\n\nNote: All information related to the " + titled + ", will also be deleted?\n\nDelete?");
}