var sliderHeight="";			// these need to be defined globally so 
var divToSlide="";		// javascript doesn't "forget" them when
var fullSlideHeight="";		// calling a setTimeout

// USER DEFINABLE VARIABLES
var sliderSpeed=30;			// time between frames.  10 is really fast. 100 is really slow.
var sliderAccel=2;			// Acceleration frames.  From "many" 1.1 to a "few" fast 3.	

function SlidingOpen(height) {
	if (height<=fullSlideHeight) {					// if we're not done sliding
		document.getElementById(divToSlide).style.height = height+'px';	// set the new height 
		if (height<(fullSlideHeight/2)) {				// accelerate up for the first half
			sliderHeight=Math.round(height*sliderAccel)+1;	
		}
		else {
			sliderHeight=fullSlideHeight-Math.round((fullSlideHeight-height)/sliderAccel)+1;	// decelerate for the second half
		}
		setTimeout("SlidingOpen(sliderHeight)",sliderSpeed);	// call next slide height
	}
	else {
		document.getElementById(divToSlide).style.height = "auto";	// set the final height 
		sliderHeight="";			// reset the global vars when done
		divToSlide="";
		fullSlideHeight="";
	}
}

function SlideOpen(objId) {							// slides open given div id
	if (document.getElementById(objId).style.display != 'none') {	// if it's already open
		return;
	}
	document.getElementById(objId).style.overflow = 'hidden';	// in case the user forgot
	document.getElementById(objId).style.height = '1px';		// start opening at 1px high
	document.getElementById(objId).style.display = 'block';		// make it visible
	fullSlideHeight=document.getElementById(objId).scrollHeight;		// set the final height globally
	divToSlide=objId;											// define div ID global
	SlidingOpen(1);												// slide divToSlide open
	document.getElementById(objId).style.display = '';
	return;
}

function SlidingClosed(height) {	//  given next height
	document.getElementById(divToSlide).style.height = height+'px';	// set the new height
	if (height>0) {												// if we're not done closing
		if (height>(fullSlideHeight/2)) {								// accelerate the first half
			sliderHeight=Math.round(fullSlideHeight-(fullSlideHeight*sliderAccel)+(height*sliderAccel))-1;
			if (sliderHeight<(fullSlideHeight/2)) {							// to make sure cut off point is at 1/2 way
				sliderHeight=Math.round(fullSlideHeight/2)-1;
			}
		}
		else {
			sliderHeight=Math.round(height/sliderAccel)-1;					// decelerate the second
		}
		setTimeout("SlidingClosed(sliderHeight)",sliderSpeed);			// call next slide height
	}
	else {
		document.getElementById(divToSlide).style.display = 'none';	// disappear the div
		sliderHeight="";			// reset the global vars when done
		divToSlide="";
		fullSlideHeight="";
	}
}

function SlideClosed(objId) {							// slides closed given div id
	if (document.getElementById(objId).style.display == 'none') {	// if it's already closed
		return;
	}
	document.getElementById(objId).style.overflow = 'hidden';	// in case the user forgot
	fullSlideHeight=document.getElementById(objId).scrollHeight;		// set the start height globally
	if (!fullSlideHeight) {												// for IE mac
		fullSlideHeight=document.getElementById(objId).offsetHeight;
	}
	fullSlideHeight-=10;												// remove the padding from scrollHeight
	divToSlide=objId;											// define div ID global
	SlidingClosed(fullSlideHeight-1);									// slide divToSlide closed
	document.getElementById(objId).style.display == 'none';
	return;
}