function onLoad() {
	var scriptHasUncommentedLines;
	var isAdvanced = (g_form.getValue('advanced') === 'true');
	var origScriptVal = (g_form.getValue('script').trim());
	var doesScriptExist = (!!origScriptVal);
	
	if (!isAdvanced && doesScriptExist) {
		scriptHasUncommentedLines = (getUncommentedLines(origScriptVal).length > 0);
		if (scriptHasUncommentedLines) {
			showExpandingFormMessage(
				'<strong>ACL Script Contains uncommented Code, but the "Advanced" ' +
				'Checkbox is set to false</strong>. <br />' +
				'This code will still execute, which can cause performance issues and ' +
				'unexpected behavior!',
				'<p>As per <a href="https://support.servicenow.com/kb?id=kb_article_view' +
				'&sysparm_article=KB0728012" target="_blank">KB0728012</a>, Business Rules and ACLs ' +
				'with the "Advanced" checkbox set to <strong>false</strong> <i>will still execute any ' +
				'code in the "Script" field</i>. <br />' +
				'This can cause performance issues and unexpected behavior that can be very ' +
				'difficult to troubleshoot, so it\'s recommended to remove any code in the "Script" ' +
				'field if the "Advanced" checkbox is set to <strong>false</strong>.</p>',
				'More info',
				'Hide info'
			);
		}
	}
	
	function getUncommentedLines(codeToCheck) {
		var uncommentedLines = [];
		var isMultilineComment = false;
		const lines = codeToCheck.split('\n');
		
		lines.forEach(line => {
			if (isMultilineComment) {
				if (line.includes('*/')) {
					isMultilineComment = false;
					const remaining = line.split('*/')[1];
					if (remaining.trim() !== '') {
						uncommentedLines.push(remaining);
					}
				}
			} else {
				if (!line.trim() || line.trim().startsWith('//')) {
					return;
				}
				
				if (line.trim().startsWith('/*')) {
					isMultilineComment = true;
					const remaining = line.split('/*')[0];
					if (remaining.trim() !== '') {
						uncommentedLines.push(remaining);
					}
					return;
				}
				
				uncommentedLines.push(line);
			}
		});
		
		return uncommentedLines;
	}
	
	/**
	 * Display an expandable form message. This message will be shown at the top of whatever form
	 *  this code is executed on. The text in firstLine will be shown, but the text in flyoutText
	 *  will be hidden until the user clicks the 'expand' link.
	 *
	 * @param {String} firstLine - The first line of text in the message, which will be shown
	 *  immediately when this code executes. Unlike the text in flyoutText, this text will not
	 *  be hidden.
	 * @param {String|HTML_TEXT} flyoutText - This text will be hidden by default, but will be shown
	 *  once the user clicks the 'expand' link (which you can customize by setting expandLinkText).
	 * @param {String} [expandLinkText="Show more"] - Optionally specify the text to be shown as
	 *  a clickable link, which will cause the form message to expand and display the text
	 *  specified in flyoutText.
	 * @param {String} [collapseLinkText="Hide details"] - Optionally specify the text to be shown
	 *  after the user clicks the 'expand' link text (specified in expandLinkText).
	 * This text will be shown when the message is expanded and the text specified in flyoutText
	 *  is shown. Upon clicking this text, the message will be collapsed, flyoutText will be hidden,
	 *  and the link text will revert back to that specified in expandLinkText.
	 *
	 * @example
	 * showExpandingFormMessage(
	 *  'This message expands',
	 *  flyoutListHTML,
	 *  'Show more',
	 *  'Hide details'
	 * );
	 */
	function showExpandingFormMessage(firstLine, flyoutText, expandLinkText, collapseLinkText) {
		var formMsg = firstLine;
		
		expandLinkText = (typeof expandLinkText !== 'string') ? 'Show more' : expandLinkText;
		collapseLinkText = (typeof collapseLinkText !== 'string') ? 'Hide details' : collapseLinkText;
		
		formMsg += '<div>';
		formMsg += '<p><a href="#" onclick="javascript:jQuery(this.parentNode).next().toggle(200); ' +
			'this.innerText = ((this.innerText === \'' + expandLinkText + '\')?\'' + collapseLinkText +
			'\':\'' + expandLinkText + '\');">' + expandLinkText + '</a></p>';
		formMsg += '<div style="display: none;">';
		formMsg += flyoutText;
		formMsg += '</div>';
		formMsg += '</div>';
		
		g_form.addErrorMessage(formMsg);
	}
}