function checksend(fObj){

  if( fObj.elements[0].value.length < 4){
   alert("Please Enter 4 Digits Numbers");
   return false;
  
  }

}

function checkinput(iObj){

   if(isNaN(iObj.value.charAt(iObj.value.length-1))){
     alert("Accept Numbers Only");
        
     iObj.value="";
    
   }
	
	

}