function verifydata()
{
    for (var i = 0;i < document.login.elements.length;i++){
        if (isEmpty(document.login.elements[i].value))
        {
           alert("Error! \n\nAll fields are required. Please complete all fields.");
           return false;
        }
	}
	    
		
}

function isEmpty(data)
{
	   for (var i=0; i<data.length; i++){
	      if(data.substring(i, i+1) != " ")
	         return(false);
	   }
	   return(true);
}