jQuery.fn.extend({ 
        disableSelection : function() { 
                this.each(function() { 
                        this.onselectstart = function() { return false; }; 
                        this.unselectable = "on"; 
                        jQuery(this).css('-moz-user-select', 'none'); 
                }); 
        } 
}); 

window.onload = function() {
jQuery('.noSelect').disableSelection();
}