Question

Object doesnt support this property or method - jQuery Javascript Error in IE7

Asked by: dwaynecharrington

I am getting a couple of Javascript errors in IE7 relating to a custom jQuery plugin that I wrote. The plugin works fine, but the Javascript error is annoying and needs to be dealt with.

The errors are:

"Object doesnt support this property or method" - When trying to call the custom plugin by: $("#q").dwaynefield(); The element with the ID of Q is a text field.

"Expected identifier, string or number" - Line 55 of my custom plugin which is ' $(field).attr({class: "blurField"});'

If anyone has a solution to this problem, I'd appreciate it. I've pasted the plugin code below.

If parts of my plugin need to be rewritten in your opinion, I'm all ears. As long as I can deal with this issue sometime soon, I'd be very grateful.

(function($) {
    
    // Function name: Dwaynefield
    $.fn.dwaynefield = function(options) {
        
        // Options array
        // Default swap type is text, but can also be class.
        // Text means text values are only swapped
        // Class means that classes are swapped
        var options = $.extend( {swap: 'text'}, options);
    
        this.each(function() {
            
            var field        = $(this);
            var defaultValue = field.val();
            var currentClass = field.attr('class');
            
            switch(options.swap) {
            
                case 'text':
                    $(field).focus( function () {
                        
                        if(this.value == defaultValue) {
                            this.value = '';
                        }
                        
                        if(this.value == defaultValue) {
                            this.value = '';
                        }
                        
                    });       
            
                    $(field).blur( function () {
                    
                        if(this.value == "") {
                            this.value = defaultValue;
                        }
                        
                    });
                break;
                
                case 'class':
                    
                    $(field).focus( function () {
                    
                        if($(field).attr("class") == currentClass) {
                            $(field).attr({class: "blurField"});
                        }
                        
                    });   
 
                    $(field).blur( function () {
                    
                        if($(field).attr("class") != currentClass && field.value == "") {
                            $(field).attr({class: currentClass});
                        }
                        
                    });                         
                break;
                
            }
        
        });
    
        // allow jQuery chaining
        return this;
    
    };
 
})(jQuery);

                                  
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Asked On
2009-09-13 at 21:22:52ID24728626
Tags

jQuery

,

Javascript

,

Internet Explorer 7

,

IE7

Topics

Jquery

,

JavaScript Frameworks

Participating Experts
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Points
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Comments
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Answers

 

by: hieloPosted on 2009-09-13 at 23:02:55ID: 25323120

class is a reserved keyword. So intead of just:
$(field).attr({class: "blurField"});

you need to put quotes around class:
$(field).attr({'class': "blurField"});

(function($) {
    
    // Function name: Dwaynefield
    $.fn.dwaynefield = function(options) {
        
        // Options array
        // Default swap type is text, but can also be class.
        // Text means text values are only swapped
        // Class means that classes are swapped
        var options = $.extend( {swap: 'text'}, options);
    
        return this.each(function() {
            
            var field        = $(this);
            var defaultValue = field.val();
            var currentClass = field.attr('class');
            alert(field.attr("id"))
            switch(options.swap) {
            
                case 'text':
                    $(field).focus( function () {
                        
                        if(this.value == defaultValue) {
                            this.value = '';
                        }
                        
                        if(this.value == defaultValue) {
                            this.value = '';
                        }
                        
                    });       
            
                    $(field).blur( function () {
                    
                        if(this.value == "") {
                            this.value = defaultValue;
                        }
                        
                    });
                break;
                
                case 'class':
                    
                    $(field).focus( function () {
                    
                        if($(field).attr("class") == currentClass) {
                            $(field).attr({'class': "blurField"});
                        }
                        
                    });   
 
                    $(field).blur( function () {
                    
                        if($(field).attr("class") != currentClass && field.value == "") {
                            $(field).attr({'class': currentClass});
                        }
                        
                    });                         
                break;
                
            }
        
        });
    
        // allow jQuery chaining
        return this;
    
    };
 
})(jQuery);

                                              
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by: dwaynecharringtonPosted on 2009-09-13 at 23:40:42ID: 31628248

Thank you very much. Worked a treat.

20120131-EE-VQP-002

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