/*
Strip whitespace from the beginning and end of a string
Input : a string
*/
function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}

/*
Make sure that textBox only contain number
*/
function checkNumber(textBox)
{
	while (textBox.value.length > 0 && isNaN(textBox.value)) {
		textBox.value = textBox.value.substring(0, textBox.value.length - 1)
	}
	
	textBox.value = trim(textBox.value);
/*	if (textBox.value.length == 0) {
		textBox.value = 0;		
	} else {
		textBox.value = parseInt(textBox.value);
	}*/
}

/*
	Check if a form element is empty.
	If it is display an alert box and focus
	on the element
*/
function isEmpty(formElement, message) {
	formElement.value = trim(formElement.value);
	
	_isEmpty = false;
	if (formElement.value == '') {
		_isEmpty = true;
		alert(message);
		formElement.focus();
	}
	
	return _isEmpty;
}

/*
	Set one value in combo box as the selected value
*/
function setSelect(listElement, listValue)
{
	for (i=0; i < listElement.options.length; i++) {
		if (listElement.options[i].value == listValue)	{
			listElement.selectedIndex = i;
		}
	}	
}

function valbn(thisform) {
	myOption = -1;
	for (i=thisform.fid.length-1; i > -1; i--) {
		if (thisform.fid[i].checked) {
			myOption = i; i = -1;
		}
	}
	if (myOption == -1) {
		alert("You must select one report");
	return false;
	}

	thisform.submit();
}

function valbutton(thisform) {
  myOption = -1;
  for (i=thisform.fid.length-1; i > -1; i--) {
    if (thisform.fid[i].checked) { 
      myOption = i; i = -1;
    } 
  } 
  if (myOption == -1) { 
    alert("You must select a radio button");
    return false;
  }
  else {
    alert("You selected button number " + myOption +
          " which has a value of " + thisform.fid[myOption].value);
    return true;
  }
}