rem: blockImage.checked = this.isImageBlocked(); 
add: if (this.isImageBlocked()) { blockImage.setAttribute("checked", "true"); } else blockImage.removeAttribute("checked"); 
context:     initMiscItems : function () {        // Use "Bookmark This Link" if on a link.        this.showItem( "context-bookmarkpage", !( this.isTextSelected || this.onTextInput || this.onLink ) );        this.showItem( "context-bookmarklink", this.onLink && !this.onMailtoLink );        this.showItem( "context-searchselect", this.isTextSelected );        this.showItem( "frame", this.inFrame );        this.showItem( "frame-sep", this.inFrame );        this.showItem( "context-blockimage", this.onImage);        if (this.onImage) {          var blockImage = document.getElementById("context-blockimage");          blockImage.checked = this.isImageBlocked();        }    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/f747a3138355d28a6c74b185f5de5c54c6e7f5a0/nsContextMenu.js/buggy/toolkit/content/nsContextMenu.js