function isIE(){ //ie? 
   if (window.navigator.userAgent.toLowerCase().indexOf("msie")>=1) 
    return true; 
   else 
    return false; 
} 

if(!isIE()){ //firefox innerText define
   HTMLElement.prototype.__defineGetter__(     "innerText", 
    function(){
     var anyString = "";
     var childS = this.childNodes;
     for(var i=0; i<childS.length; i++) {
      if(childS[i].nodeType==1)
       anyString += childS[i].tagName=="BR" ? '\n' : childS[i].textContent;
      else if(childS[i].nodeType==3)
       anyString += childS[i].nodeValue;
     }
     return anyString;
    } 
   ); 
   HTMLElement.prototype.__defineSetter__(     "innerText", 
    function(sText){ 
     this.textContent=sText; 
    } 
   ); 
}