function check(myForm,obj) 
{
         
         if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,6})+$/.test(obj.value))
         {
            
         }
        else{
            alert("Please enter valid Email Address.");
            obj.focus(); 
            return (false);
        } 
        return true;
}
function checkemail(obj)
{
      
    if(obj.value=='enter e-mail address')
    obj.value='';

    else
    {
        var emailinfo=obj.value; 
        obj.value=emailinfo;
    }
} 
function checkemails(obj)
{
  if(obj.value=='')
  obj.value='enter e-mail address';  
    
}