JS火狐与IE的差别

function isIE(){ //ie?
       if (window.navigator.userAgent.toLowerCase().indexOf("msie")>=)
          return true;
       else
          return false;
    } 

    if(!isIE()){ //firefox innerText define
        HTMLElement.prototype.__defineGetter__("innerText", function(){
            var textRange = this.ownerDocument.createRange();
            textRange.selectNodeContents(this);
            return textRange.toString();  

            var anyString = "";
            var childS = this.childNodes;
            for(var i=; i<childS.length; i++){
               if(childS[i].nodeType==)
                 anyString += childS[i].tagName=="BR" ? '\n' : childS[i].innerText;
               else if(childS[i].nodeType==)
                 anyString += childS[i].nodeValue;
            }
             return anyString;
       });
       HTMLElement.prototype.__defineSetter__("innerText",function(sText){
          this.textContent=sText;
       });
    }