Free Code Collection

To prevent closing by clicking on the overlay and remove the ‘close’ link
(better IMHO than just disabling it), remove line 38:
$("#TB_overlay").click(TB_remove);

remove the TB_closeWindow <div> from line 133:
$("#TB_window").append("<a href=” id=’TB_ImageOff’ title=’Close’><img
id=’TB_Image’ src=’"+url+"’ width=’"+imageWidth+"’ height=’"+imageHeight+"’
alt=’"+caption+"’/></a>" + "<div id=’TB_caption’>"+caption+"<div
id=’TB_secondLine’>" + imageCount + prev.html + next.html + "</div></div>");

remove line 135:
$("#TB_closeWindowButton").click(TB_remove);

remove the TB_closeAjaxWindow <div> from line 205:
$("#TB_window").append("<div id=’TB_title’><div
id=’TB_ajaxWindowTitle’>"+caption+"</div></div><iframe
frameborder=’0′
hspace=’0′ src=’"+urlNoQuery[0]+"’ id=’TB_iframeContent’
name=’TB_iframeContent’ style=’width:"+(ajaxContentW +
29)+"px;height:"+(ajaxContentH + 17)+"px;’ onload=’TB_showIframe()’>
</iframe>");

and 207:
$("#TB_window").append("<div id=’TB_title’><div
id=’TB_ajaxWindowTitle’>"+caption+"</div></div><div
id=’TB_ajaxContent’
style=’width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;’></div>");

remove line 210:
$("#TB_closeWindowButton").click(TB_remove);
and remove lines 258-259:
$("#TB_overlay").unbind("click");
$("#TB_closeWindowButton").unbind("click");


Thickbox also has a keydown handler so that if you push ‘escape’ it closes.
Remove lines 236-245 to prevent this:
document.onkeyup = function(e){
if (e == null) { // ie
keycode = event.keyCode;
} else { // mozilla
keycode = e.which;
}
if(keycode == 27){ // close
TB_remove();
}
}


To add the ‘close’ functionality to something, do this:
$("#myTbCloseButton").click(TB_remove);

Source: (http://www.mail-archive.com/discuss@jquery.com/msg18856.html)