Javascripters plz help

I have made a little slider below(not perfect i know)....and i have some bugs in it......
help me debug them plz

i want 'marq_box' to hide as soon as height of 'slide_box' is less than 219px. therefore i made the function hideInnerSlide(); which ofcourse is wrong that is why the script is not working.....can anyone help me with this.....plz

in my css the original height of 'silde_box' is 220px;

the javascript code is below:

<script type="text/javascript">
var active= 1;
var height= 300;

function toggle_visible(){
	if(active==0){
		active = 1;
		divminus();
	}
	else if(active==1){
		active = 0;
		divplus();
	}
}

function divminus(){
if(height>=1){
	height = height - 5;
	document.getElementById('slide_box').style.height = height + "px";
	hideInnerSlide();
	window.setTimeout('divminus()',1);
                }
	else{
	document.getElementById'slide_box').style.display="none";
	}
}
			
function divplus(){
	if(height <= 300){
		document.getElementById('slide_box').style.display="block";
		height = height + 5;
		document.getElementById('slide_box').style.height = height + "px";
		window.setTimeout('divplus()',1);
	}
}

function hidePtr(){
	shown = document.getElementById('pointer').style.visibility == "visible";
	unshown= document.getElementById('pointer').style.visibility = "hidden";
	if(shown){
		document.getElementById('pointer').style.visibility = "hidden";
	}
	else if(unshown)
	{
		document.getElementById('pointer').style.visibility == "visible";
	}

function hideInnerSlide(){
	ht = document.getElementById('slide_box').style.height;
	if(ht <= 219)
	{
		document.getElementById('marq_box').style.display="none";
		divminus();
	}
}
}
</script>

for any more info about the code please ask....

but plz help......

Thanks All.......

i figured it out myself:

i used the height vaiable i declared on top for comparing and inside divminus() and divplus()
and removed the hideInnerSlide() completely

CODE:

var active= 0;
var height= 0;

function toggle_visible(){
if(active==0){
	active = 1;
	divplus();
}
else if(active==1){
	active = 0;
	divminus();
}
}

function divminus(){
if(height>=1){
	height = height - 5;
	document.getElementById('slide_box').style.height = height + "px";
	if(height < 230){
		document.getElementById('marq_box').style.display="none";
	}
	window.setTimeout('divminus()',1);					
}
else{
	document.getElementById('slide_box').style.display="none";
}
}

function divplus(){
if(height <= 250){
	document.getElementById('slide_box').style.display="block";
	height = height + 5;
	document.getElementById('slide_box').style.height = height + "px";
	if(height > 240){
		document.getElementById('marq_box').style.display="block";
	}
	window.setTimeout('divplus()',1);
}
}

function hidePtr(){
shown = document.getElementById('pointer').style.visibility == "visible";
unshown= document.getElementById('pointer').style.visibility = "hidden";
if(shown){
	document.getElementById('pointer').style.visibility = "hidden";
}
else if(unshown)
{
	document.getElementById('pointer').style.visibility == "visible";
}
}
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