to debug javascript (errors :) ) in internet explorer

you can use debugger; directive to step into default javascript debugger (visual studio 2005)
or you can create debugger window and paste variables there:

var dbgwin;
dbgwin=window.open("", "Debug", "left=0,top=0,width=300,height=700,scrollbars=yes," +"status=yes,resizable=yes");
function log(msg){
dbgwin.document.write("<br>"+msg);
}

log('Started');

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