将前台HTML页面转义替普通的html文本

将前台HTML页面转义为普通的html文本
Use YUI get the element.
var summaryAreaElement = get('summaryArea');
var summaryAreaValue=summaryAreaElement.value;
summaryAreaValue=summaryAreaValue.replace(/>/g,">");
summaryAreaElement.value=summaryAreaValue.replace(/</g,"&lt;");