function isNumeric(sText)
{
	var ValidChars = "0123456789.,";
	var IsNumber=true;
	var Char;
	
	for (i = 0; i < sText.length && IsNumber == true; i++) 
	{ 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) 
		{
			IsNumber = false;
		}
	}
	
	return IsNumber;   
}

function isChecked(frm)
{
	var formElements = frm.elements;
	var el = new Array();
	j = 0;
	for (i=0; i<formElements.length;i++)
	{
		if (formElements[i].type == "checkbox")
		{
			el[j] = formElements[i];
			j++;
		}
	}
	
	countUnchecked = 0;
	
	for (j=0; j<el.length;j++)
	{
		if (!el[j].checked)
		{
			countUnchecked++;
		}
	}
	
	if (countUnchecked == el.length)
	{
		return false;
	}
	else
	{
		return true;
	}
}