function PHPFMG(){
    this.$ = function( id ){
        return document.getElementById(id);
    };
    
    this.highlight_fields = function( fields ){
        var A = fields.split(',');
        for( var i = 0, N = A.length; i < N; i ++ ){
            var E = this.$( A[i] + '_div' );
            if( E ){
                E.className += ' form_error_highlight'; 
            };
        };
    };
    
    this.choice_clicked = function( id ){
        this.$(id).checked = !this.$(id).checked ;
    };
    
}
var fmgHandler = new PHPFMG();