/*	copyright Hakyung Jung	*/
/*	JS written by hakyung http://mmlab.snu.ac.kr/~hkjung*/
	
	function abstractToggle(abstract, button) { 
		if (abstract.style.display == 'none')  {
			abstract.style.display = '';
			button.innerHTML="<img src='images/hideabstract.png' alt='Hide Abstract' class='bottom'>";
		} else {
			abstract.style.display = 'none'; 
			button.innerHTML="<img src='images/showabstract.png' alt='Show Abstract' class='bottom'>";
		}
	}