function submit_form(){
  
      var err_message1 = "*Mobile numbers format is incorrect. Please enter again.";
      var err_message2 = "*Please read the Terms and Conditions";
      var err_message3 = "*Please enter your mobile numbers.";
	  var err_message4 = "*Please check the Mobile numbers format. Eg: 125554444";	  
  
      var subChnl = document.getElementById('subChnl');
      var terms = document.getElementById('terms');
      var msisdn = document.getElementById('msisdn');
      var message = document.getElementById('message');
      var num_form = document.getElementById('num_form');
      var content_value;
      
      with ( num_form )
          {
                if( msisdn.value==null||msisdn.value=="" ){message.innerHTML=err_message3;msisdn.focus();return false;}
                if( !terms.checked ){message.innerHTML=err_message2;return false;}
				if(msisdn.value.substr(0,1)==0 || msisdn.value.substr(0,2)==60){message.innerHTML=err_message4;return false;}
                if( msisdn.value.length!=9 ){message.innerHTML=err_message1;return false;}
          }
      var strLocation = "common/processingRequest.php?msisdn="+msisdn.value;
      if(subChnl != 0){ strLocation = strLocation+"&subChnl="+subChnl.value; } // adding DP to param
      setTimeout(function(){window.location = strLocation;},10);
  }

  function swapImage( id,imagePath ){
      var imagePath,id;
      document.getElementById(id).src = imagePath;
  }

  function mouseOver(){
         swapImage( 'button','http://static.mygempak.com/4d/4d/images/btn_submits_over.jpg' );
  }

  function mouseOut(){
         swapImage( 'button','http://static.mygempak.com/4d/4d/images/btn_submits.jpg' );
  }