JS转换HTML转义符的方法

function removeHtmlTab(tab) {  return tab.replace(/<[^<>]+?>/g,'');//删除所有HTML标签 } 

function html2Escape(sHtml) {  return sHtml.replace(/[<>&"]/g,function(c){return {'<':'<','>':'>','&':'&','"':'"'}[c];}); } 

function escape2Html(str) {  var arrEntities={'lt':'<','gt':'>','nbsp':' ','amp':'&','quot':'"'};  return str.replace(/&(lt|gt|nbsp|amp|quot);/ig,function(all,t){return arrEntities[t];}); } 

function nbsp2Space(str) {  var arrEntities = {'nbsp' : ' '};  return str.replace(/&(nbsp);/ig, function(all, t){return arrEntities[t]}) } 

function return2Br(str) {  return str.replace(//r?/n/g,"<br />"); } 

function trimBr(str) {  str=str.replace(/((/s| )*/r?/n){3,}/g,"/r/n/r/n");//限制最多2次换行  str=str.replace(/^((/s| )*/r?/n)+/g,'');//清除开头换行  str=str.replace(/((/s| )*/r?/n)+$/g,'');//清除结尾换行  return str; } 

function mergeSpace(str) {  str=str.replace(/(/s| )+/g,' ');  return str; }