function conditionValid()
{
	if ( !condition.AREA1.checked && !condition.AREA2.checked && !condition.AREA3.checked
		&& !condition.AREA4.checked && !condition.AREA5.checked && !condition.AREA6.checked
		&& !condition.AREA7.checked && !condition.AREA8.checked && !condition.AREA9.checked
		)
	{
		alert("Please choose one or more area.");
		return false;
	}
}
function checkAll(value)
{
	// Get object count in this form.
	var objCount = document.forms[0].elements.length;
	
	// Check object type.
	for ( i=0; i<objCount; i++ )
	{
		if ( document.forms[0].elements[i].type == 'checkbox' )
		{
			document.forms[0].elements[i].checked = value;
		}
	}
}