compareVersions

compareVersions.js

function compareVersions(version1,version2){

      function splitVersion(version){
        if(typeof version !== 'string'){ throw ('sting is valid for version!'); }
        return version.toString().split('.');
      }
  
      function _checkValue(arr){
          return val ? val : 0;
       }
  
      var result=false;
      var version1=splitVersion(version1);
      var version2=splitVersion(version2);
  
      for(var i=0,_versionLength=Math.max(version1.length,version2.length);i<_versionLength;i++){
        version1[i]=_checkValue(version1[i])
        version2[i]=_checkValue(version2[i])
       
        if(version1[i]<version2[i]){
          result=true;
          break;
        }
        if(version1[i]!=version2[i]){
          break;
        }
      }
      return result;
    }