一个关于菜单的问题，我看不太懂，有人可以帮我注释，讲解一下吗，谢了(程序1)

[missshan]

stringx+='<div id=msubmenudiv'+j+
' style="filter:Alpha(Opacity=80);tag:'+thisitem.level+';cursor:'+mcursor+';position:absolute;'+
'width:'+mmenuitemwidth+'px; z-index:'+(j+200);
if(mmenuinbordercolor!=mmenuoutbordercolor&&msubedge=="0"){
stringx+=';border-left: 1px solid '+mmidoutcolor+
';border-top: 1px solid '+mmidoutcolor;}
stringx+=';border-right: 1px solid '+mmenuinbordercolor+
';border-bottom: 1px solid '+mmenuinbordercolor+';visibility:hidden" onselectstart="event.returnValue=false">\n'+
'<table width="100%" border="0" height="100%" align="center" cellpadding="0" cellspacing="2" '+
'style="'+mfonts+' border-left: 1px solid '+mmenuoutbordercolor;
if(mmenuinbordercolor!=mmenuoutbordercolor&&msubedge=="0"){
stringx+=';border-right: 1px solid '+mmidincolor+
';border-bottom: 1px solid '+mmidincolor;}
stringx+=';border-top: 1px solid '+mmenuoutbordercolor+
';padding: 4px" bgcolor='+mmenucolor+'>\n'
for(var i=0;i<thisitem.items.length;i++){
var thismenuitem=thisitem.items[i];
var imgsize="";
if(thismenuitem.sizex!="0"||thismenuitem.sizey!="0")imgsize=" width="+thismenuitem.sizex+" height="+thismenuitem.sizey;
var ifspace="";
if(thismenu.caption!="")ifspace=" ";
if(thismenuitem.hasc!=null){
stringx += "<tr><td id=mp"+thismenuitem.hasc+" class=coolButton style='border: "+mitemedge+"px solid "+mmenucolor+
"' width=100% onmouseout=mmenuitem_out(true) onmouseover=\"mmenuitem_over(msubmenudiv"+j+
",'"+thismenuitem.hasc+"',-1,"+j+","+i+");mshowsubmenu(msubmenudiv"+thismenuitem.hasc+",mp"+thismenuitem.hasc+",msubmenudiv"+j+");\""+
"><table id=mitem"+thismenuitem.hasc+" cellspacing='0' cellpadding='0' border='0' width='100%' style='"+mfonts+"'><tr><td ";
if(thismenuitem.pos=="0"){
stringx += "><img align=absmiddle src='"+thismenuitem.img+"'"+imgsize+">"+ifspace+thismenuitem.caption+"</td><td";
}else if(thismenuitem.pos=="1"){
stringx += ">"+thismenuitem.caption+ifspace+"<img align=absmiddle src='"+thismenuitem.img+"'"+imgsize+"></td><td";
}else if(thismenuitem.pos=="2"){
stringx += "background='"+thismenuitem.img+"'>"+thismenuitem.caption+"</td><td background='"+thismenuitem.img+"'";
}else{
stringx += ">"+thismenuitem.caption+"</td><td";
}
stringx += " align=right width='1'><font face='Webdings' style='font-size: 6pt'>4</font></td></tr></table></td></tr>\n";
}else if(!thismenuitem.isline){
stringx += "<tr><td class=coolButton style='border: "+mitemedge+"px solid "+mmenucolor+
"' width=100% height=15px onmouseover=\"mmenuitem_over(msubmenudiv"+j+
",false,-1,"+j+","+i+");\" onmouseout=mmenuitem_out() onmousedown=mmenuitem_down() onmouseup=";
stringx += "mmenuitem_up();mexec3("+j+","+i+"); ";
if(thismenuitem.pos=="0"){
stringx += "><img align=absmiddle src='"+thismenuitem.img+"'"+imgsize+">"+ifspace+thismenuitem.caption+"</td></tr>";
}else if(thismenuitem.pos=="1"){
stringx += ">"+thismenuitem.caption+ifspace+"<img align=absmiddle src='"+thismenuitem.img+"'"+imgsize+"></td></tr>";
}else if(thismenuitem.pos=="2"){
stringx += "background='"+thismenuitem.img+"'>"+thismenuitem.caption+"</td></tr>";
}else{
stringx += ">"+thismenuitem.caption+"</td></tr>";
}
}else{
stringx+='<tr><td height="1" background="/images/hr.gif" onmousemove="clearTimeout(mpopTimer);"><img height="1" width="1" src="none.gif" border="0"></td></tr>\n';
}
}
stringx+='</table>\n</div>'
}
document.write("<div align='center' id='JsMenuCSS'>"+stringx+"</div>");
}