gistfile1.js

$(function() {
        $('a[id$="mainLink"]').attr("rel", "#overlay").overlay({
            effect: 'apple',
            onBeforeLoad: function() {
            
                var linkEl = this.getOverlay().find("#passthrough"),
                    link = this.getTrigger().attr("href"),
                    iframe = this.getOverlay().find("#iframe");


                $('#disclaimer').show(); 
                $('#iframe-wrapper').hide();

                linkEl.attr("href", "#");
                iframe.attr("src", this.getTrigger().attr("href"));
                
                //check for article link
                if (link.indexOf("/publications/article.aspx?Id") == 0) {
                    linkEl.attr("href", "javascript:(function(){ $('#disclaimer').hide(); $('#iframe-wrapper').show(); })()");
                } else {
                    linkEl.attr("href", this.getTrigger().attr("href"));
                }
            },
            close: '#close'

        });
    })