javascript html dom checkbox

กรณีโค้ดด้านล่าง คือ checkbox ที่สร้างโดย msoffice excel เมือต้องการ เซตค่า กาในช่อง checkbox

<OBJECT class=shape id=sv_ot height=25 width=146
classid=CLSID:8BD21D40-EC42-11CE-9E0D-00AA006002F3 v:shapes =
"_x0000_s1027"><PARAM NAME="VariousPropertyBits" VALUE="1015023635"><PARAM NAME="BackColor" VALUE="14737632"><PARAM NAME="ForeColor" VALUE="2147483656"><PARAM NAME="MaxLength" VALUE="0"><PARAM NAME="BorderStyle" VALUE="0"><PARAM NAME="ScrollBars" VALUE="0"><PARAM NAME="DisplayStyle" VALUE="4"><PARAM NAME="MousePointer" VALUE="0"><PARAM NAME="Size" VALUE="3863;661"><PARAM NAME="PasswordChar" VALUE="0"><PARAM NAME="ListWidth" VALUE="0"><PARAM NAME="BoundColumn" VALUE="1"><PARAM NAME="TextColumn" VALUE="65535"><PARAM NAME="ColumnCount" VALUE="1"><PARAM NAME="ListRows" VALUE="8"><PARAM NAME="cColumnInfo" VALUE="0"><PARAM NAME="MatchEntry" VALUE="2"><PARAM NAME="ListStyle" VALUE="0"><PARAM NAME="ShowDropButtonWhen" VALUE="0"><PARAM NAME="ShowListWhen" VALUE="1"><PARAM NAME="DropButtonStyle" VALUE="1"><PARAM NAME="MultiSelect" VALUE="0"><PARAM NAME="Value" VALUE="0"><PARAM NAME="Caption" VALUE="ทำงานล่วงเวลา"><PARAM NAME="PicturePosition" VALUE="458753"><PARAM NAME="BorderColor" VALUE="2147483654"><PARAM NAME="SpecialEffect" VALUE="2"><PARAM NAME="Accelerator" VALUE="0"><PARAM NAME="GroupName" VALUE="Sheet1"><PARAM NAME="FontName" VALUE="Arial"><PARAM NAME="FontEffects" VALUE="1073741824"><PARAM NAME="FontHeight" VALUE="180"><PARAM NAME="FontOffset" VALUE="0"><PARAM NAME="FontCharSet" VALUE="0"><PARAM NAME="FontPitchAndFamily" VALUE="2"><PARAM NAME="ParagraphAlign" VALUE="1"><PARAM NAME="FontWeight" VALUE="400"></OBJECT>

ให้ใช้ javascript

if ("<%=rs2.fields("sv_ot")%>" =="1")
{
document.getElementById("sv_ot").value=true;
}
else
{
document.getElementById("sv_ot").value=false;
}