/* Checkboxes */

function checkAll(theForm) {
    for (i=0,n=theForm.elements.length;i<n;i++)
        if (theForm.elements[i].name.indexOf('chk_') !=-1)
            theForm.elements[i].checked = true;
}

function uncheckAll(theForm) {
    for (i=0,n=theForm.elements.length;i<n;i++)
        if (theForm.elements[i].name.indexOf('chk_') !=-1)
            theForm.elements[i].checked = false;
}

function checkVisible(theForm) {
    for (i=0,n=theForm.elements.length;i<n;i++)	
        if ((theForm.elements[i].type == 'checkbox') && (theForm.elements[i].parentNode.parentNode.style.display !== 'none'))
            theForm.elements[i].checked = true;
}


/* Global Nav */
var timerID = null; 
var timerOn = false; 
/* Menu will hide after this timeout (ms) */
var timecount = 400; 

function navOver(layerName){hideAll(); showLayer(layerName); stopTime();}
function navOut(){ startTime(); }


function showLayer(layerName) { 
		if (document.getElementById) {
			document.getElementById(layerName + "Layer").style.visibility="visible"; 
			document.getElementById(layerName).style.backgroundPosition = "0 -13px";
		}
	} 
	
function hideLayer(layerName) { 
	if (document.getElementById) {
		document.getElementById(layerName + "Layer").style.visibility="hidden";
			document.getElementById(layerName).style.backgroundPosition = "top left";
		} 
	
	} 

function hideAll() {
	//Put all layers used in the nav here.  
	if (document.getElementById) {
	hideLayer("aboutNav");
	}
} 

function startTime() {  if (timerOn == false) {  timerID=setTimeout("hideAll()" , timecount);  timerOn = true;  }  } 
function stopTime() {  if (timerOn) {  clearTimeout(timerID);  timerID = null;  timerOn = false;  }  } 


// Form validation

function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel,focus)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		
		if (focus)
		{
			formField.focus();
		}
		
		result = false;
	}
	
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

function validNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!allDigits(formField.value))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validInt(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result && formField.value != '')
 	{
 		var num = parseInt(formField.value,10);
 		if (isNaN(num))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0],10);
  			var day = parseInt(elems[1],10);
 			var year = parseInt(elems[2],10);
			result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && (day > 0) && (day < 32) &&
					 allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
} 
  




// minmax.js: make IE5+/Win support CSS min/max-width/height
// version 1.0, 08-Aug-2003
// written by Andrew Clover <and@doxdesk.com>, use freely

/*@cc_on
@if (@_win32 && @_jscript_version>4)

var minmax_elements;

minmax_props= new Array(
  new Array('min-width', 'minWidth'),
  new Array('max-width', 'maxWidth'),
  new Array('min-height','minHeight'),
  new Array('max-height','maxHeight')
);

// Binding. Called on all new elements. If <body>, initialise; check all
// elements for minmax properties

function minmax_bind(el) {
  var i, em, ms;
  var st= el.style, cs= el.currentStyle;

  if (minmax_elements==window.undefined) {
    // initialise when body element has turned up, but only on IE
    if (!document.body || !document.body.currentStyle) return;
    minmax_elements= new Array();
    window.attachEvent('onresize', minmax_delayout);
    // make font size listener
    em= document.createElement('div');
    em.setAttribute('id', 'minmax_em');
    em.style.position= 'absolute'; em.style.visibility= 'hidden';
    em.style.fontSize= 'xx-large'; em.style.height= '5em';
    em.style.top='-5em'; em.style.left= '0';
    if (em.style.setExpression) {
      em.style.setExpression('width', 'minmax_checkFont()');
      document.body.insertBefore(em, document.body.firstChild);
    }
  }

  // transform hyphenated properties the browser has not caught to camelCase
  for (i= minmax_props.length; i-->0;)
    if (cs[minmax_props[i][0]])
      st[minmax_props[i][1]]= cs[minmax_props[i][0]];
  // add element with properties to list, store optimal size values
  for (i= minmax_props.length; i-->0;) {
    ms= cs[minmax_props[i][1]];
    if (ms && ms!='auto' && ms!='none' && ms!='0' && ms!='') {
      st.minmaxWidth= cs.width; st.minmaxHeight= cs.height;
      minmax_elements[minmax_elements.length]= el;
      // will need a layout later
      minmax_delayout();
      break;
  } }
}

// check for font size changes

var minmax_fontsize= 0;
function minmax_checkFont() {
  var fs= document.getElementById('minmax_em').offsetHeight;
  if (minmax_fontsize!=fs && minmax_fontsize!=0)
    minmax_delayout();
  minmax_fontsize= fs;
  return '5em';
}

// Layout. Called after window and font size-change. Go through elements we
// picked out earlier and set their size to the minimum, maximum and optimum,
// choosing whichever is appropriate

// Request re-layout at next available moment
var minmax_delaying= false;
function minmax_delayout() {
  if (minmax_delaying) return;
  minmax_delaying= true;
  window.setTimeout(minmax_layout, 0);
}

function minmax_stopdelaying() {
  minmax_delaying= false;
}

function minmax_layout() {
  window.setTimeout(minmax_stopdelaying, 100);
  var i, el, st, cs, optimal, inrange;
  for (i= minmax_elements.length; i-->0;) {
    el= minmax_elements[i]; st= el.style; cs= el.currentStyle;

    // horizontal size bounding
    st.width= st.minmaxWidth; optimal= el.offsetWidth;
    inrange= true;
    if (inrange && cs.minWidth && cs.minWidth!='0' && cs.minWidth!='auto' && cs.minWidth!='') {
      st.width= cs.minWidth;
      inrange= (el.offsetWidth<optimal);
    }
    if (inrange && cs.maxWidth && cs.maxWidth!='none' && cs.maxWidth!='auto' && cs.maxWidth!='') {
      st.width= cs.maxWidth;
      inrange= (el.offsetWidth>optimal);
    }
    if (inrange) st.width= st.minmaxWidth;

    // vertical size bounding
    st.height= st.minmaxHeight; optimal= el.offsetHeight;
    inrange= true;
    if (inrange && cs.minHeight && cs.minHeight!='0' && cs.minHeight!='auto' && cs.minHeight!='') {
      st.height= cs.minHeight;
      inrange= (el.offsetHeight<optimal);
    }
    if (inrange && cs.maxHeight && cs.maxHeight!='none' && cs.maxHeight!='auto' && cs.maxHeight!='') {
      st.height= cs.maxHeight;
      inrange= (el.offsetHeight>optimal);
    }
    if (inrange) st.height= st.minmaxHeight;
  }
}

// Scanning. Check document every so often until it has finished loading. Do
// nothing until <body> arrives, then call main init. Pass any new elements
// found on each scan to be bound   

var minmax_SCANDELAY= 500;

function minmax_scan() {
  var el;
  for (var i= 0; i<document.all.length; i++) {
    el= document.all[i];
    if (!el.minmax_bound) {
      el.minmax_bound= true;
      minmax_bind(el);
  } }
}

var minmax_scanner;
function minmax_stop() {
  window.clearInterval(minmax_scanner);
  minmax_scan();
}

minmax_scan();
minmax_scanner= window.setInterval(minmax_scan, minmax_SCANDELAY);
window.attachEvent('onload', minmax_stop);

@end @*/