codice:
function a() {
	var td_ms, sContent, oContent, tr_list = b('nome_class');
	for (i=0; i<tr_list.length; i++) {
		tr_curr = tr_list[i];
		
		td_list = tr_curr.getElementsByTagName('td');
		td_ms = td_list[10];
		if (document.all) {
			sContent = td_ms.innerText;
		} else {
			oContent = document.createRange();
			oContent.selectNodeContents(td_ms);
			sContent = oContent.toString();
		}
		alert(sContent); // ecco il contenuto!!
	}
}

function b(cl) {
	var retnode = [];
	var myclass = new RegExp('\\b'+cl+'\\b');
	var elem = document.getElementsByTagName('*');

	for (var i = 0; i < elem.length; i++) {
		var classes = elem[i].className;
		if (myclass.test(classes)) 
			retnode.push(elem[i]);
	}
	
	return retnode;
}