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 = " "
}
Lex.prototype.build = function(){
	this.span.className = this.css()
	this.span.innerHTML = this.html()
}
Lex.prototype.css = function(){
	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(){
	return this.char == "%" ? '%%' : this.char || " "
}
var fgOnly = false
Lex.prototype.mirc = function(){
	var char = this.char || " "
	if (parseInt(char)) {
		char = "\x02\x02" + char
	}
	if (fgOnly) {
		return "\x03" + (this.fg&15) + char
	}
	if (this.bg == 1 && this.fg == 0) {
		return 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.build()
}
Lex.prototype.erase = function (lex){
	if (lex.opacity == 0) return
	this.fg = colors.white
	this.bg = colors.black
	this.char = " "
	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.fg && this.char == lex.char
}
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
}
Lex.prototype.demolish = function(){
	this.span.parentNode.removeChild(this.span)
	this.span = null
}
Lex.prototype.key = function(char, keyCode) {
	if (! char) { return }
	this.char = char
	this.fg = brush.bg
	this.build()
}