// updated for w3c only.


// updates and changes
// -------------------------------------
// 11.21.2003 - glide now supports interrupting calls



function pointer(name, link) {
    this.p = document.getElementById(name).style
    this.elm = this.event = document.getElementById(name)
    this.width = this.elm.offsetWidth 
	this.height = this.elm.offsetHeight
	this.x = this.elm.offsetLeft
	this.y = this.elm.offsetTop
	
	this.name = name
	this.lcname = name.toLowerCase()
	this.obj = name + "pointer"
	eval (this.obj+"=this")
	
	if(link) this.link = link
	
	this.moveto = pointerMoveTo
	this.moveby = pointerMoveBy
	this.clipto = pointerClipTo
	this.show = pointerShow
	this.hide = pointerHide
	
	this.scroll_moving = 0
	this.s_up = pointerScrollUp 
	this.s_down = pointerScrollDown
	this.expand_moving=0
	this.expand = pointerExpand
	this.contract_moving=0
	this.contract = pointerContract
	this.glide_moving = 0
	this.glide_dest = 0
	this.glide_destv = 0
	this.glide_movingv = 0
	this.glideh = pointerGlideHoriz
	this.glideh_c = pointerGlideHorizCore
	
	this.glidev = pointerGlideVert
	this.glidev_c = pointerGlideVertCore
}

function pointerMoveTo(x,y) {
	if(this.link) this.link.moveby(x-this.x,y-this.y)
	this.p.left = this.x = x
	this.p.top = this.y = y
}

function pointerMoveBy(x,y) {
	this.moveto(this.x+x, this.y+y)
}

function pointerClipTo(t,r,b,l) {
	this.width = r
	this.height = b
	this.p.clip = "rect("+t+"px "+r+"px "+b+"px "+l+"px)"
}

function pointerShow() {
	this.p.visibility = "visible"
}

function pointerHide() {
	this.p.visibility = "hidden"
}

function pointerScrollUp(max_y, cur_jump, max_jump, speed) {
	if (this.scroll_moving) {
		if (this.y <= max_y) {
			this.moveby(0,cur_jump)
			if(cur_jump<max_jump) cur_jump++;
			setTimeout(this.name.toLowerCase()+".s_up("+max_y+","+cur_jump+","+max_jump+","+speed+")",speed)
		}
	}
}

function pointerScrollDown(min_y, cur_jump, max_jump, speed) {
	if (this.scroll_moving) {
		if (this.y >= min_y) {
			this.moveby(0,-cur_jump)
			if(cur_jump<max_jump) cur_jump++;
			setTimeout(this.name.toLowerCase()+".s_up("+min_y+","+cur_jump+","+max_jump+","+speed+")",speed)
		}
	}
}

function pointerExpand(x, y, xmov, ymov, speed) {
	if(!this.contract_moving){
		this.expand_moving=1;
		this.clipto(0, this.width+xmov, this.height+ymov, 0)
		if(this.width>x) this.clipto(0, x, this.height, 0)
		if(this.height>y) this.clipto(0, this.width, y, 0)
		if((this.width!=x)||(this.height!=y))
			setTimeout(this.name.toLowerCase()+".expand("+x+","+y+","+xmov+","+ymov+","+speed+")", speed)
		else this.expand_moving--;
	}
}

function pointerContract(x, y, xmov, ymov, speed) {
	if(!this.expand_moving){
		this.contract_moving=1;
		this.clipto(0, this.width-xmov, this.height-ymov, 0)
		if(this.width<x) this.clipto(0, x, this.height, 0)
		if(this.height<y) this.clipto(0, this.width, y, 0)
		if((this.width!=x)||(this.height!=y))
			setTimeout(this.name.toLowerCase()+".contract("+x+","+y+","+xmov+","+ymov+","+speed+")", speed)
		else this.contract_moving--;
	}
}

function pointerGlideHoriz(x) {
	this.glide_dest = x
	if((!this.glide_moving)&&(this.x!=x)){
		this.glide_moving=1
		this.glideh_c(0,1,10)
	}
}

function pointerGlideHorizCore(xmov, speed, fuzzyness) {
	if(Math.abs(this.x-this.glide_dest)>3){
		xmov_mod = 0
		if(!xmov)
			if(this.glide_dest<this.x) xmov--
				else xmov++
		if(Math.abs(this.glide_dest-this.x)<Math.abs(xmov)*fuzzyness) xmov_mod -= xmov/fuzzyness
			else this.glide_dest<this.x?xmov_mod--:xmov_mod++
		this.moveby(xmov,0)
		xmov += xmov_mod
		setTimeout(this.name.toLowerCase()+".glideh_c("+xmov+","+speed+","+fuzzyness+")", speed)
	}
		else {
			this.moveto(this.glide_dest,this.y)
			this.glide_moving=0
		}
}

function pointerGlideVert(y) {
	if(!this.glide_movingv){
		this.glide_movingv=1
		this.glidev_c(y,0,1,10)
	}
}



function pointerGlideVert(y) {
	this.glide_destv = y
	if((!this.glide_movingv)&&(this.y!=y)){
		this.glide_movingv=1
		this.glidev_c(0,1,10)
	}
}

function pointerGlideVertCore(ymov, speed, fuzzyness) {
	if(Math.abs(this.y-this.glide_destv)>3){
		ymov_mod = 0
		if(!ymov)
			if(this.glide_destv<this.y) ymov--
				else ymov++
		if(Math.abs(this.glide_destv-this.y)<Math.abs(ymov)*fuzzyness) ymov_mod -= ymov/fuzzyness
			else this.glide_destv<this.y?ymov_mod--:ymov_mod++
		this.moveby(ymov,0)
		ymov += ymov_mod
		setTimeout(this.name.toLowerCase()+".glidev_c("+ymov+","+speed+","+fuzzyness+")", speed)
	}
		else {
			this.moveto(this.x,this.glide_destv)
			this.glide_movingv=0
		}
}

function pointerGlideVert(y) {
	if(!this.glide_movingv){
		this.glide_movingv=1
		this.glidev_c(y,0,1,10)
	}
}




function pointerGlideVertCore(y, ymov, speed, fuzzyness) {
	if(Math.abs(this.y-y)<=Math.abs(this.y-ymov-y)+1){
		ymov_mod = 0
		if(!ymov) ymov++
		if(y<this.y) ymov = -Math.abs(ymov)
		if(Math.abs(y-this.y)<Math.abs(ymov)*fuzzyness) ymov_mod -= ymov/fuzzyness
			else ymov<0?ymov_mod--:ymov_mod++
		this.moveby(0,ymov)
		ymov += ymov_mod
		setTimeout(this.name.toLowerCase()+".glidev_c("+y+","+ymov+","+speed+","+fuzzyness+")", speed)
	}
		else {
			this.moveto(this.x,y)
			this.glide_movingv=0
			if(this.link) this.link.glide_movingv=0
		}
}