function _isEntireRange(sContentRange){
             var aMatch = htVar.rxContentRange.exec(sContentRange || ""); // [1]=total, [2]=items
             return (aMatch) ? !(parseInt(aMatch[1], 10) < parseInt(aMatch[2], 10)) : true;
         }
Return whether the given content range is an entire range for items.
e.g) "items 10/10"

@param {String} sContentRange the value of Content-Range header from response
@return {Boolean}