JS to tidy/align spaces

tidy.js

	function tidySpaces() {
		var olCode, spans, i, span_textnode, span_text, span_next, offLeft, newLeft;
		if (document.getElementsByClassName) {
			spans = document.getElementsByClassName('tidy');
			if (spans != 'undefined' && spans.length) {
				for ( i = 0; i < spans.length; i++ )
					spans[i].style.paddingLeft = (spans[i].style.paddingLeft == '0px') ? 
						spans[i].prevValue : '0px';
				return;
			}
		}
		olCode = document.getElementById('olCode');
		spans = olCode.getElementsByTagName('span');
		for (i = 0; i < spans.length; i++) {
			if ( spans[i].previousSibling ) {
				if ( spans[i].className && spans[i].className == 'comment')
					continue;
				span_textnode = spans[i].firstChild;
				span_text = span_textnode.data;
				tidied = span_text.replace(/\s{2,}$/,'');
				if (span_text.length && (span_text.length > tidied.length)) {
					if ( spans[i].nextSibling ) {
						span_next = spans[i];
						while ( (span_next = span_next.nextSibling) && span_next.className 
							&& span_next.className == 'comment' && span_next.nextSibling )
							;		// do nothing, get next span (or 'a' tag)
						if ( span_next ) {
							offLeft = span_next.offsetLeft;
							newLeft = (parseInt(offLeft / 60)) * 60 + 60;
							span_next.style.paddingLeft = (newLeft - offLeft) + 'px';
							span_next.className = 'tidy';
							span_next.prevValue = span_next.style.paddingLeft;
						}
					}
				}
			}
		}
	}