function clearOnFocus(field) {
	if (field.value == field.defaultValue) field.value = "";
}
function restoreOnBlur(field) {
	if (field.value == "") field.value = field.defaultValue;
}
function submitOnEnter(field, event) {
	if(event.keyCode==13){
		field.form.submit();
	}
}

/********** text size methods *************/
var numDefaultTextSize = 12;
var numMinimumTextSize = 8;
var numMaximumTextSize = 32;
var numTextSizeIncrement = 4;
var strTextSizeUnit = "px";
// get elements to resize
function getDefaultResizeElements() {
	// add elements to be resized to the array
	return [
	    document.getElementById("content-wrapper")
	];
}
// get current text size
function getTextSize (el) {
	var size = numDefaultTextSize;
	if (el.style.fontSize != "") {
		size = parseFloat(el.style.fontSize.replace(/[^0-9\.]/,""))
	}
	return size;
}
// set text size, also stored in cookie
function setTextSize (el, size) {
	if (size == numDefaultTextSize) {
		Set_Cookie('fontsize', null);
		el.style.fontSize = null;
	} else {
		Set_Cookie('fontsize', size);
		el.style.fontSize = size + strTextSizeUnit;
	}
}
// called from page to make text larger
function textLarger () {
	var aryEl = getDefaultResizeElements();
	var numSize = getTextSize(aryEl[0]) + numTextSizeIncrement;
	numSize = Math.min(numMaximumTextSize, numSize);
	for (var n in aryEl) {
		if (aryEl[n] != null)
			setTextSize(aryEl[n], numSize)
	}
}
// called from page to make text smaller
function textSmaller () {
	var aryEl = getDefaultResizeElements();
	var numSize = getTextSize(aryEl[0]) - numTextSizeIncrement;
	numSize = Math.max(numMinimumTextSize, numSize);
	for (var n in aryEl) {
		if (aryEl[n] != null)
			setTextSize(aryEl[n], numSize)
	}
}
// called on page load to retrieve value from cookie and set to page elements
function loadTextSize () {
	el = getDefaultResizeElements()[0];
	if (el != null) {
		if (Get_Cookie('fontsize') != null) {
			setTextSize(el, Get_Cookie('fontsize'));
		}
	} else {
		setTimeout("loadTextSize ()",100);
	}
}
loadTextSize();

// cookie methods

/* function from http://techpatterns.com/downloads/javascript_cookies.php */
function Set_Cookie( name, value, expires, path, domain, secure ) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	
	/*
	if the expires variable is set, make the correct
	expires time, the current script below will set
	it for x number of days, to make it for hours,
	delete * 24, for minutes, delete * 60 * 24
	*/
	if ( expires ) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	
	document.cookie = name + "=" + escape( value ) +
		( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
		( ( path ) ? ";path=" + path : "" ) +
		( ( domain ) ? ";domain=" + domain : "" ) +
		( ( secure ) ? ";secure" : "" );
}
	
/* function from http://techpatterns.com/downloads/javascript_cookies.php */
function Get_Cookie( check_name ) {
	// first we'll split this cookie up into name/value pairs
	// note: document.cookie only returns name=value, not the other components
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; // set boolean t/f default f

	for ( i = 0; i < a_all_cookies.length; i++ ) {
		// now we'll split apart each name=value pair
		a_temp_cookie = a_all_cookies[i].split( '=' );

		// and trim left/right whitespace while we're at it
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

		// if the extracted name matches passed check_name
		if ( cookie_name == check_name ) {
			b_cookie_found = true;
			// we need to handle case where cookie has no value but exists (no = sign, that is):
			if ( a_temp_cookie.length > 1 )
			{
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			// note that in cases where cookie is initialized but no value, null is returned
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found ) {
		return null;
	}
}