//
// NOTE!  Only put truly reusuable functions in here.  
// Wait until you have at least two or three different pages using your function before putting it here.
// Use <script type="text/javascript"> .... </script> on your page until you reach that threshold.  
//

// Used for hiding and showing a span or div value, (block or inline)
function setDisplayStyle(objID, displayValue) {
	// displayValue param should be: none, block, or inline
	//alert("setDisplayStyle " + document.getElementById(objID));
	var style = document.getElementById(objID).style;
	style.display = displayValue; 
}


// Hides the block with the given ID
// Deprecated in favor of the more flexible setDisplayStyle function
function hideBlock(strObjID) {
	alert("hiding block " + stringObjId);
	var style = document.getElementById(strObjID).style;
	style.display = "none";
	return true;
}
// Shows the block with the given ID
// Deprecated in favor of the more flexible setDisplayStyle function
function showBlock(strObjID) {
	alert("showing block " + stringObjId);
	var style = document.getElementById(strObjID).style;
	style.display = "block";
	return true;
}


// 
// 
// hides the specified (strObjID + "_subnav") id
// Deprecated in favor of the more flexible setDisplayStyle function
function hide_subnav(strObjID) {
      var style = document.getElementById(strObjID + "_subnav").style;
      style.display = "none";
}

// shows the specified (strObjID + "_subnav") id
// Deprecated in favor of the more flexible setDisplayStyle function
function show_subnav(strObjID) {
      var style = document.getElementById(strObjID + "_subnav").style;
      style.display = "block";
}

// Returns the href from the related element.
// Elements are related as follows:
//    If o.id = "xa_yyyy"
//    the related element must have an id = "a_yyyy".
// In short, the first character is dropped to find the id of the related item
function ga(o,e) {
	if (document.getElementById) {
		a=o.id.substring(1);
		p = "";
		r = "";
		g = e.target;
		if (g) {
			t = g.id;
			f = g.parentNode;
			if (f) {
				p = f.id;
				h = f.parentNode;
				if (h) r = h.id;
			}
		} else {
			h = e.srcElement;
			f = h.parentNode;
			if (f) p = f.id;
			t = h.id;
		}
		if (t==a || p==a || r==a) return true;
		location.href=document.getElementById(a).href
	}
}

// navigationKeyCodes: 
// 8=backspace, 37=left-arrow, 46=delete, 9=tab, 39=right-arrow, 13=enter, 16=shift, 116=F5
var navigationKeyCodes = "|8|37|46|9|39|13|16|116|";

// Allows only numbers and certain nav keys into the entry field.
// Use: <input type="text" onKeyDown="return numbersOnly(event);" />
// Or jQuery: $('input#pageNum').keydown(numbersOnly)
function numbersOnly(e) {
	var keyCode = (e.charCode || e.keyCode || 0);
	// Safari fix
	if (navigationKeyCodes.indexOf("|" + keyCode + "|") >= 0) return true;
	if (keyCode >= 96 && keyCode <= 105) return true; // numeric keypad values.
	return /\d/.test(String.fromCharCode(keyCode));
}

function getKeyCode(e) {
	// alternative implementation
	return (e.charCode || e.keyCode || 0);
// This is here for historical purposes in case the above doesn't always work.
//	var keyCode = 0;
//	if (window.event) {
//		keyCode = e.keyCode;  // IE and Safari
//	} else if (e.which) { 
//		keyCode = e.which; // Netscape/Firefox/Opera
//	}
//	return keyCode;
}

// Submits the form when "enter" is pressed.
// Use: <input type="text" onKeyDown="return submitEnter(this, event) ;" />
// For a numeric field use: <input type="text" onKeyDown="return submitEnter(this, event) && numbersOnly(event);" />
function submitEnter(myField, e) {
	var keyCode = e.charCode || e.keyCode || 0; 
	var returnValue = false;
	if (keyCode == 13/*enter*/)	{
		myField.form.submit();
	} else { returnValue = true; }
	return returnValue;
}