// JScript File

function textCounter( field, countfield, maxlimit )
        {

  	        if ( field.value.length > maxlimit )
  	        {
  		        field.value = field.value.substring( 0, maxlimit-1 );
    	        alert( 'You have to limit Your Message To Maximum of 500 characters' );
    	        return false;
  	        }
        }