/********************************************************************/
// validate_email()
// returns true if email appears valid
/********************************************************************/
function validate_email(email) {
	email = email.trim();
	if( email.match(/(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/) || !email.match(/^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/) ) return false;
	return true;
}


/********************************************************************/
// Errors class
/********************************************************************/
function Errors() {
	this.errors = new Array();

	this.add = function(msg) {
		this.errors[this.errors.length] = msg;
	}
	this.alert = function() {
		if(!this.errors.length) return false;

		var msg = 'The following error(s) have occurred:\n\n';

		for(var i=0; i<this.errors.length; ++i) {
			msg += '*  ' + this.errors[i];
			if(i < this.errors.length - 1) msg += '\n\n';
		}

		alert(msg);
		return true;
	}
}



/********************************************************************/
// getLeft(), getTop()
// these have been replaced by mootools with obj.getLeft(), obj.getTop()
/********************************************************************/
//function getLeft(obj) {
//	return (obj.offsetParent==null ? obj.offsetLeft : obj.offsetLeft + getLeft(obj.offsetParent));
//}
//function getTop(obj) {
//	return (obj.offsetParent==null ? obj.offsetTop : obj.offsetTop + getTop(obj.offsetParent));
//}



/********************************************************************/
// hasFlash()
// attempt to determine if the flash plugin is installed
/********************************************************************/
function hasFlash() {
	window.bHasFlash = false;

	var plugin = (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"]) ? navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0;
	if ( plugin ) window.bHasFlash = true;
	else if (navigator.userAgent && navigator.userAgent.indexOf("MSIE")>=0 && (navigator.appVersion.indexOf("Win") != -1)) {
		document.write('<SCR' + 'IPT LANGUAGE=VBScript\> \n'); //FS hide this from IE4.5 Mac by splitting the tag
		document.write('on error resume next\nwindow.bHasFlash = ( IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & 6)))\n');
		document.write('</SCR' + 'IPT\> \n');
	}

	return window.bHasFlash;
}




/********************************************************************/
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
/********************************************************************/
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}