function showChanges() {
	if (!document.styleSheets) return;
	var theRules = new Array();
	if (document.styleSheets[0].cssRules)
		theRules = document.styleSheets[0].cssRules
	else if (document.styleSheets[0].rules)
		theRules = document.styleSheets[0].rules
	else return;
	theRules[theRules.length-1].style.display = 'inline';
	theRules[theRules.length-2].style.textDecoration = "underline";
    document.getElementById("show_changes").style.display = "none";
	document.getElementById("hide_changes").style.display = "inline";
}

function hideChanges() {
	if (!document.styleSheets) return;
	var theRules = new Array();
	if (document.styleSheets[0].cssRules)
		theRules = document.styleSheets[0].cssRules
	else if (document.styleSheets[0].rules)
		theRules = document.styleSheets[0].rules
	else return;
	theRules[theRules.length-1].style.display = 'none';
	theRules[theRules.length-2].style.textDecoration = "none";
	document.getElementById("hide_changes").style.display = "none";
	document.getElementById("show_changes").style.display = "inline";
}