/* Centova Webmail
 * Copyright 2005, eSite Media Inc.
 *
 * Utility script
 */

NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
W3C = (document.getElementById) ? 1 : 0;

function get_document() {
	if (this.framename) {
  		return parent[this.framename].document
	} else {
		return document
	}
}

function get_window_height() {
    if (IE4) {
        return parseInt (window.document.body.clientHeight);
    } else {
        return parseInt (window.innerHeight);
    }
}

function get_window_width() {
    if (IE4) {
        return parseInt (window.document.body.clientWidth);
    } else {
        return parseInt (window.innerWidth);
    }
}

function get_style(name) {
	var mydoc = this.browser.getDocument();
	
	if (W3C) {
		return mydoc.getElementById(name).style;
	} else if (NS4) {
		return mydoc.layers[name];
	} else {
		return mydoc.all[name].style;
	}
	
}

function get_layer(name) {
	var mydoc = this.browser.getDocument();
	
	if (W3C) {
		return mydoc.getElementById(name);
	} else if (NS4) {
		return mydoc.layers[name];
	} else {
		return mydoc.all[name];
	}
	
}

function layer_hide(name) {
	var mystyle = this.style(name);

	if (NS4) {
		mystyle.visibility = 'hide';
	} else {
		mystyle.visibility = 'hidden'
	}
}

function layer_show(name) {
	var mystyle = this.style(name);

	if (NS4) {
		mystyle.visibility = 'show';
	} else {
		mystyle.visibility = 'visible'
	}
}

function layer_visible(name) {
	var mystyle = this.style(name);

	return ((mystyle.visibility == 'visible') || (mystyle.visibility == 'show'))
}

function layer_write(name,text) {
	var mydoc = this.browser.getDocument();
 	writeto = W3C ? mydoc.getElementById(name) : IE4 ? mydoc.all[name] : NS4 ? mydoc.layers[name].document : 0;	
 	if (NS4) {
 		writeto.write(text);
 		writeto.close();
 	} else {
 		writeto.innerHTML = text;
 	}
}

function layer_read(name) {
	var mydoc = this.browser.getDocument();
    readfrom = W3C?mydoc.getElementById(name):IE4?mydoc.all[name]:NS4?mydoc.layers[name].document:0;
    if (NS4) {
      	// not sure what the correct technique is; too lazy to look up;
        // this undoubtedly breaks NS4 support; tough shit
    	return readfrom.innerHTML;
    } else {
		return readfrom.innerHTML;
	}
}

function get_client_height() {
	mydoc = this.getDocument();

	var myheight = (mydoc.documentElement.clientHeight ? mydoc.documentElement.clientHeight : mydoc.body.clientHeight ? mydoc.body.clientHeight : window.innerHeight);
	return myheight;
}

function get_client_width() {
	mydoc = this.getDocument();
	var mywidth = (mydoc.documentElement.clientWidth ? mydoc.documentElement.clientWidth : mydoc.body.clientWidth ? mydoc.body.clientWidth : window.innerWidth);
	return mywidth;
}

function layer_get_pos(el) {
	var SL = 0, ST = 0;
	var is_div = /^div$/i.test(el.tagName);
	if (is_div && el.scrollLeft)
		SL = el.scrollLeft;
	if (is_div && el.scrollTop)
		ST = el.scrollTop;
	var r = { x: el.offsetLeft - SL, y: el.offsetTop - ST };
	if (el.offsetParent) {
		var tmp = layer_get_pos(el.offsetParent);
		r.x += tmp.x;
		r.y += tmp.y;
	}
	return r;
}

function layer_get_size(el) {
	var r = { x: el.offsetWidth, y: el.offsetHeight };
	return r;
}

function layer_get_actualsize(el) {
	var r = { 
		x: el.offsetWidth, 
		y: el.offsetHeight 
	};
	return r;
}


function get_click_pos(e) {
	var posx = 0;
	var posy = 0;
	var r = { x: 0, y: 0 };
	
	if (!e) var e = window.event;
	if (e.pageX || e.pageY)
	{
		r.x = e.pageX;
		r.y = e.pageY;
	}
	else if (e.clientX || e.clientY)
	{
		r.x = e.clientX + document.body.scrollLeft;
		r.y = e.clientY + document.body.scrollTop;
	}
	return r;
}

function get_window_scroll_pos() {
	var r = { x: 0, y: 0 };
	if (IE4) {
		r.x = document.body.scrollLeft;
		r.y = document.body.scrollTop;
	} else {
		r.x = window.pageXOffset
		r.y = window.pageYOffset
	}
	
	return r;
}

function Browser() {
	this.getDocument = get_document;
	this.windowHeight = get_window_height;
	this.windowWidth = get_window_width;
	this.clientHeight = get_client_height;
	this.clientWidth = get_client_width;
	this.clickPos = get_click_pos;
	this.windowScrollPos = get_window_scroll_pos;

	this.handlers = new Array();
	this.handlers['mousemove'] = new Array();	
	this.handlers['mousedown'] = new Array();
	this.handlers['mouseup'] = new Array();
}

Browser.prototype.register_handler = function(handlertype,handlermethod) {
	if (!this.handlers[handlertype]) {
		alert('Invalid handler: '+handler);
		return;
	}
	this.handlers[handlertype].push(handlermethod);
	document['on'+handlertype] = this['handle_'+handlertype];
}
Browser.prototype.deregister_handler = function(handlertype,handlermethod) {
	if (!this.handlers[handlertype]) {
		alert('Invalid handler: '+handler);
		return;
	}
	this.handlers[handlertype].remove(handlermethod);
	if (this.handlers[handlertype].length==0) document['on'+handlertype] = null;
}
Browser.prototype.call_handlers = function(handlertype,e) {
	e = this.get_event(e);
	for (var i=0; i<this.handlers[handlertype].length; i++) {
		var handler = this.handlers[handlertype][i]
		handler(e);
	}
}

Browser.prototype.handle_mousedown = function(e) {
	browser.call_handlers('mousedown',e);
}
Browser.prototype.handle_mouseup = function(e) {
	browser.call_handlers('mouseup',e);
}
Browser.prototype.handle_mousemove = function(e) {
	browser.call_handlers('mousemove',e);
}

// Make sure an event contains all of the properties we need
Browser.prototype.get_event = function(e) {
	if (typeof e == 'undefined') e = window.event;
	if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
	if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
	if (typeof e.target == 'undefined') e.target = e.srcElement;
	if (e.target.nodeType == 3) targ = targ.parentNode; // defeat Safari bug, apparently

	if (typeof e.keyCode == 'undefined') e.keyCode = e.which;
		
	return e;
}

Browser.prototype.disable_page = function(dodisable,shaded,cursor) {
	if (this.isdisabled==dodisable) return;
		
	if (dodisable) {
		this.disable_page_element = document.createElement('div');
		this.disable_page_element.className = 'disabled_page'+(shaded?' disabled_page_shaded':'');
		
		this.disable_page_element.style.width = (browser.clientWidth() - 2)+'px';
		this.disable_page_element.style.height = browser.clientHeight()+'px';
		if (cursor) this.disable_page_element.style.cursor = cursor;
		
		document.body.insertBefore(this.disable_page_element,document.body.childNodes[0]);
	} else {
		document.body.removeChild(this.disable_page_element);
		this.disable_page_element = null;
	}
}

Browser.prototype.popup_centered = function(location,name,width,height,options) {
	if (options==null) {
		options = ',toolbar=no,location=no,status=no,menubar=no,scrollbars=no,scrolling=no';
	} else {
		options = ','+options;
	}
	var w = screen.width;
	var h = screen.height;
	
	if (!w || !h) {
		w = this.clientWidth();
		h = this.clientHeight();
	}
	var l = Math.floor((w - width) / 2);
	var t = Math.floor((h - height) / 2);
	
	window.open(location,name,'top='+t+',left='+l+',width='+width+',height='+height+options);	
}

Browser.prototype.setcookie = function(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	} else {
		var expires = "";
	}
	document.cookie = name+"="+value+expires+"; path=/";
}

Browser.prototype.getcookie = function(name) {
	name += '=';
	var cookies = document.cookie.split(';');
	for(var i=0;i < cookies.length; i++) {
		var c = cookies[i];
		if (c.charAt(0)==' ') c = c.replace(/^\s+/,'');
		if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
	}
	return null;
}

Browser.prototype.clearcookie = function(name) {
	this.setcookie(name,"",-1);
}

function Layer() {
	this.style = get_style;
	this.get = get_layer;
	this.hide = layer_hide;
	this.show = layer_show;
	this.visible = layer_visible;
	this.write = layer_write;
	this.read = layer_read;
	this.position = layer_get_pos;
	this.size = layer_get_size;
	this.actualsize = layer_get_actualsize;
}

var browser = new Browser();
var layer = new Layer();

browser.layer = layer;
layer.browser = browser;


String.prototype.ltrim = function() {
	return this.replace(/^\s+/,'');
}

String.prototype.rtrim = function() {
	return this.replace(/\s+$/,'');
}

String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/,'');
}