// JavaScript Document

function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {
    alert(alerttxt);return false;
    }
  else
    {
    return true;
    }
  }
}

function validate_email(field,alerttxt)
{
with (field)
  {
  apos=value.indexOf("@");
  dotpos=value.lastIndexOf(".");
  if (apos<1||dotpos-apos<2)
    {alert(alerttxt);return false;}
  else {return true;}
  }
}

function validate_required_combo(field,alerttxt)
{
with (field)
  {
  if (selectedIndex==0)
    {
    alert(alerttxt);return false;
    }
  else
    {
    return true;
    }
  }
}

function validate_required_radio(field,noOfRB,alerttxt)
{
selected=false;
with (field)
  {
  for (i=0;i<=noOfRB-1;i++)
  {
	  if (field[i].checked==true)
	  	{
			selected=true;break;
		}
  }
  if (selected==false)
	{
	alert(alerttxt);return false;
	}
  else
	{
	return true;
	}
  }
}