function toggle(obj) {
	var el = document.getElementById(obj);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = '';
	}
}

function $() {
	var elements = new Array();
	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}

/* --- cookie functions --- */
function getCookie( name ) {
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
		return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ';', len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}

function setCookie( name, value, expires, path, domain, secure ) {
	var today = new Date();
	today.setTime( today.getTime() );
	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() : '' ) + //expires.toGMTString()
		( ( path ) ? ';path=' + path : '' ) +
		( ( domain ) ? ';domain=' + domain : '' ) +
		( ( secure ) ? ';secure' : '' );
}

function deleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) document.cookie = name + '=' +
			( ( path ) ? ';path=' + path : '') +
			( ( domain ) ? ';domain=' + domain : '' ) +
			';expires=Thu, 01-Jan-1970 00:00:01 GMT';
}
/* --- /cookie functions --- */

function trim(str) {
  var newstr;
  newstr = str.replace(/^\s*/, "").replace(/\s*$/, ""); 
  newstr = newstr.replace(/\s{2,}/, " "); 
  return newstr;
}

function validate_email(address) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   if(reg.test(address) == false) {
   		return false;
   }
   return true;
}

function popWindow(url, name, width, height, scrollbars, menubar, toolbar, resizable) {
	if (name == undefined) name = 'newPopWindow';
	if (width == undefined) width = 640;
	if (height == undefined) height = 600;
	if (scrollbars == undefined) scrollbars = 'yes';
	if (menubar == undefined) menubar = 'no';
	if (toolbar == undefined) toolbar = 'no';
	if (resizable == undefined) resizable = 'yes';
	screenX = ((screen.width-width)/2);
	screenY = ((screen.height-height)/2);

	newPopWindow = window.open(url, name,'menubar='+menubar+',scrollbars='+scrollbars+',toolbar='+toolbar+',screenX='+screenX+',screenY='+screenY+',width='+width+',height='+height);
	if (window.focus) {newPopWindow.focus()}
	
}

function checkTopForm() 
{
	document.getElementById('from').value = trim($('from').value);   
	if ($('name').value == '' || $('name').value == 'click to enter your first name') { alert('Please enter your first name.'); return false; }
	if (!validate_email($('from').value)) { alert('Please enter a valid email address.'); return false; }

	return true;
}

function checkBottomForm() 
{
	document.getElementById('from2').value = trim($('from2').value);
	if ($('name2').value == '' || $('name2').value == 'click to enter your first name') { alert('Please enter your first name.'); return false; }
	if (!validate_email($('from2').value)) { alert('Please enter a valid email address.'); return false; }

	return true;
}