function Lex (x,y) {
	if (typeof x == "number") {
		this.y = y
		this.x = x
		this.span = document.createElement("span")
	}
	else {
		this.span = x
	}
	this.fg = colors.white
	this.bg = colors.black
	this.char = " "
	this.opacity = 1
}
Lex.prototype.build = function(){
	this.span.className = this.css()
	this.span.innerHTML = this.html()
}
Lex.prototype.css = function(){
	if (this.opacity == 0 && ! this.char) return "fabb"
	return "f" + letters[mod(this.fg,16)] + "b" + letters[mod(this.bg,16)]
}
Lex.prototype.html = function(){
	return this.char == " " ? " " : this.char || " "
}
Lex.prototype.read = function(){
	this.char = this.span.innerHTML
	return this.char
}
Lex.prototype.ascii = function(){
	return this.char || " "
}
Lex.prototype.sanitize = function(){
	switch (this.char) {
		case "%": return "%%"
		case undefined:
		case "":  return " "
		default:  return this.char
	}
}
var fgOnly = false
Lex.prototype.mirc = function(){
	var char = this.char || " "
	if (fgOnly) {
		return "\x03" + (this.fg&15) + char
	}
	if ((this.bg&15) < 10 && parseInt(char)) {
		return "\x03" + (this.fg&15) + ",0" + (this.bg&15) + char
	}
	else {
		return "\x03" + (this.fg&15) + "," + (this.bg&15) + char
	}
}
Lex.prototype.clone = function (lex){
	if (lex.opacity == 0) return
	this.fg = lex.fg
	this.bg = lex.bg
	this.char = lex.char
	this.opacity = lex.opacity
	this.build()
}
Lex.prototype.paint = function (lex){
	if (lex.opacity == 0) return
	if (brush.draw_fg) this.fg = lex.fg
	if (brush.draw_bg) this.bg = lex.bg
	if (brush.draw_char) this.char = lex.char
	this.opacity = 1
	this.build()
}
Lex.prototype.copy = function () {
	var lex = new Lex (0,0)
	lex.clone(this)
	return lex
}
Lex.prototype.erase = function (){
	this.fg = colors.white
	this.bg = colors.black
	this.char = " "
	this.opacity = 0
	this.build()
}
Lex.prototype.fill = function(fg, bg){
	this.fg = fg
	this.bg = bg
	this.opacity = 1
	this.build()
}
Lex.prototype.eq = function(lex){
	return lex && this.fg == lex.fg && this.bg == lex.bg && this.char == lex.char
}
Lex.prototype.ne = function(lex){
	return ! this.eq(lex)
}
Lex.prototype.clear = function(){
	this.bg = 1
	this.fg = 0
	this.char = " "
	this.opacity = 0
	this.build()
}
Lex.prototype.isClear = function(){
	return this.bg == 1 && this.fg == 0 && this.char == " "
}
Lex.prototype.focus = function(){
	if (focused) focused.blur()
	this.span.classList.add('focused')
	focused = this
}
Lex.prototype.blur = function(){
	this.span.classList.remove('focused')
	focused = null
	this.onBlur && this.onBlur()
}
Lex.prototype.demolish = function(){
	if (this.span.parentNode) { this.span.parentNode.removeChild(this.span) }
	this.span = null
}
Lex.prototype.key = function(char, keyCode) {
	if (! char) { return }
	this.char = char
	this.fg = brush.fg
	this.build()
}