function isNum(theNum)
{
	if (theNum == "")
	{
		return false
	}
	
	for (i=0; i < theNum.length; i++)
	{
		if (theNum.charAt(i) < "0") {
			return false
		}
		
		if (theNum.charAt(i) > "9") {
			return false
		}
		
	}
	return true
}


function SubmitQueryForm()
{

	myEventID = document.myQueryForm.txtEventID.value;
	myComponentIndex = document.myQueryForm.optEventSource.selectedIndex;
	myComponentValue = document.myQueryForm.optEventSource.options[myComponentIndex].value

	if ((myEventID == '') || (myEventID == '*') || (isNum(myEventID)))
	{
		document.myQueryForm.action = ('find.php?EvtID=' + myEventID + '&EvtSrc=' + myComponentValue)
		return true
	}
	
	alert('The ID for an error message must be a number or *.');
	return false
}