function showAbstract(bib_key) {
		document.getElementById("abs_"+bib_key).style.position="relative";
		document.getElementById("abs_"+bib_key).style.left=0;
		text_string = "Abstract";
		document.getElementById("alk_"+bib_key).innerHTML=text_string;
		hideNotes(bib_key);
	}
	function hideAbstract(bib_key) {
		document.getElementById("abs_"+bib_key).style.position="absolute";
		document.getElementById("abs_"+bib_key).style.left="-999em";
		text_string = "<a href=\"javascript:showAbstract(\'"+bib_key+"\');\">Abstract</a>";
		document.getElementById("alk_"+bib_key).innerHTML=text_string;
	}
	function showNotes(bib_key) {
		document.getElementById("not_"+bib_key).style.position="relative";
		document.getElementById("not_"+bib_key).style.left=0;
		text_string = "Annotation";
		document.getElementById("nlk_"+bib_key).innerHTML=text_string;
		hideAbstract(bib_key);
	}
	function hideNotes(bib_key) {
		document.getElementById("not_"+bib_key).style.position="absolute";
		document.getElementById("not_"+bib_key).style.left="-999em";
		text_string = "<a href=\"javascript:showNotes(\'"+bib_key+"\');\">Annotation</a>";
		document.getElementById("nlk_"+bib_key).innerHTML=text_string;
	}