When is a button array not a button array?

[ca_redwards]

I have created a pair of bookmarklets to implement a 100% pure JavaScript
pop-up calendar. The first bookmarklet defines a library of HTML building
functions for utilization by the second in building and displaying a pop-up
calendar. This calendar has a hidden field to hold its date value, a
drop-down list to select a different month, a textbox to enter a different
year, and an array of buttons to select a different day of month. It is
this button array that seems to have an intermittent problem with becoming mysteriously undefined.
Initially, the calendar’s buttons are all blank and an opener window
function labels them with the appropriate days of the month. This
post-rendering technique works as designed. However, when I attempt to change the month, a JavaScript error implies that the button array is undefined. After dismissing the error dialog, the calendar renders okay for the new month.
What is going on?
Here are my two bookmarklets:

<a href="javascript:
function Q(V){return' Q'+(V?('='+String.fromCharCode(34)+V+String.fromCharCode(34)):'')};
function X(V){return'<X'+(V?V:'')+'>'};
function Z(V){return'<Z'+(V?V:'')+'>'+this+'</'+'Z>'};
function G(V){return'<G'+(V?V:'')+'>'+this.join('<G'+(V?V:'')+'>')};
function R(V){return'<R'+(V?V:'')+'>'+this.join('</'+'R><R'+(V?V:'')+'>')+'</'+'R>'};
String.prototype.gen=function gen()
{var js='';var arr=this.split(' ');
for(var i=0;i<arr.length;i++)
{var t=arr[i];var T=t.toUpperCase();
if(t==t.toLowerCase()){js+='window.'+T+'='+Q.toString().replace(/Q/g,T)+';'}
else{if(t==T){js+='String.prototype.'+T+'='+Z.toString().replace(/Z/g,T)+';';
js+='Array.prototype.'+T+'='+R.toString().replace(/R/g,T)+';'}
else{js+='window.'+T+'='+X.toString().replace(/X/g,T)+';';
js+='Array.prototype.'+T+'='+G.toString().replace(/G/g,T)+';'}};};
eval(js);return this;};
dhtml='A action align alt B background Base bgcolor BIG 
BLINK BODY border bordercolor bordercolordark bordercolorlight Br cellpadding cellspacing checked color cols 
colspan compact content dir DIV enctype face FONT FORM H1 
H2 H3 H4 H5 H6 HEAD height Hr href hspace HTML I id Img 
Input lang language leftmargin LI marginheight marginwidth 
maxlength Meta method name NOSCRIPT noshade nowrap 
OL onblur onchange onclick onfocus onload onmouseout 
onmouseover onreset onselect onsubmit onunload OPTION P 
PRE profile readonly rows rowspan SCRIPT SELECT size SMALL 
SPAN src start STRIKE STYLE style SUB SUP TABLE target TD 
TEXTAREA TH TITLE title topmargin TR TT type U UL valign 
value vspace width wrap'.gen();
window.status='HTML() bookmarklet library: Copyright (c) 2002, by Richard Edwards.';
void(0);// dhtml: Copyright (c) 2002, by Richard Edwards.">HTML()</a>

<a href="javascript:
m='January February March April May June July August September October November December'.split(' ');
wd='Su M Tu W Th Fr Sa'.split(' ');  
lom=[31,28,31,30,31,30,31,31,30,31,30,31];  
sz=25;
function getdate(F)
{if(F.date.value){DATE=F.date.value.split('/');M=DATE[0]-1;D=DATE[1];Y=DATE[2]} 
else{DATE=new Date();M=DATE.getMonth();D=DATE.getDate();Y=DATE.getFullYear()}; 
lom[1]=28;
if((Y% 4==0)&&((Y% 100>0)||(Y% 400==0))){lom[1]++};};
function setdate(F){F.date.value=(1.0+M)+'/'+D+'/'+Y;}; 
function render(F){alert(F.date.value)};
function newday(){getdate(this.form);D=this.value;setdate(this.form);alert(this.form.date.value)};
function newyear(){getdate(this.form);Y=this.value;setdate(this.form);render(this.form)};
function newmonth(){getdate(this.form);M=this.selectedIndex;setdate(this.form);render(this.form)};
window.render=function render(F)
{if(!F)F=this.form; 
getdate(F); f=new Date(Y,M,1);x=1-(f.getDay()); 
for(i=0;i<49;i++){F.d[i].value=(i<7?wd[i]:'');
F.d[i].onclick=this}; 
for(i=1;i<=lom[M];i++){F.d[7+i-x].value=i;F.d[7+i-x].onclick=newday}; 
for(i=0;i<m.length;i++){F.m[i].selected=(i==M);};
F.m.onchange=newmonth; F.y.value=Y;F.y.onchange=newyear; 
F.d[7+D-x].focus();
setdate(F);};
r=new Array(7).INPUT(TYPE('button')+NAME('d')+STYLE('width:'+sz+';height:'+sz)).TD(ALIGN('right')+WIDTH(sz*7)+HEIGHT(sz));
h=m.OPTION().SELECT(NAME('m'))+INPUT(TYPE('text')+SIZE(4)+NAME('y'))+INPUT(TYPE('hidden')+NAME('date'));
h=(h.TD(COLSPAN(7)+ALIGN('center')).TR()+[r,r,r,r,r,r,r].TR()).TABLE(BORDER('0')+CELLSPACING('0')+CELLPADDING('0')).FORM(NAME('frm'));  
h+='opener.render(document.forms.frm);'.SCRIPT(TYPE('text/javascript'));
window.open('','asdf','height='+sz*9+',width='+sz*8).document.write(h);
void(0);// calendar: Copyright (c) 2002, by Richard Edwards.">calendar</a>

[gil davis]

Man! Did you look at this after you posted it?

How about posting a link or fixing your post so that it isn't 50 feet wide.

[ca_redwards]

Even after I edited it. The HTML() library's string of supported tags & attributes is very long! I'll break it up, I guess. But bookmarklets are supposed to be single lines of JavaScript code.

These are each supposed to be one line.

:Richard Edwards