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//Ìí¼ÓÒ»¸öÏÂÀ­¿ò
function AddDropDownList(id,fatherCtl)
{
if(!document.getElementById(id))
{
var ddl = document.createElement('select');
ddl.setAttribute("id",id);
if(fatherCtl&&document.getElementById(fatherCtl))
document.getElementById(fatherCtl).appendChild(ddl);
else
document.body.appendChild(ddl);
}
}
//ɾ³ýÖ¸¶¨µÄÏÂÀ­¿ò
function RemoveDropDownList(id)
{
var ctl = document.getElementById(id);
if(ctl)
ctl.parentNode.removeChild(ctl);
}
//¸øÏÂÀ­¿òÌí¼ÓÑ¡Ïî
function AddDDDLOption(id,text,value)
{
var ctl = document.getElementById(id);
if(ctl)
{
ctl.options[ctl.options.length] = new Option(text,value);
}
}
//ɾ³ýËùÓÐÑ¡Ïî
function RemoveAllDDLOptions(id)
{
var ctl = document.getElementById(id);
if(ctl)
{
ctl.options.length=0;
}
}
//ɾ³ýÖ¸¶¨Ë÷ÒýµÄÑ¡Ïî
function RemoveDDLOption(id,index)
{
var ctl=document.getElementById(id);
if(ctl && ctl.options[index])
{
ctl.options[index]=null;
}
}
//»ñÈ¡ÏÂÀ­¿òÑ¡ÔñµÄÖµ
function GetDDLSelectedValue(id)
{
var ctl = document.getElementById(id);
if(ctl)
{
return ctl.options[ctl.selectedIndex].value;
}
}
//»ñÈ¡ÏÂÀ­¿òÑ¡ÔñµÄÎı¾
function GetDDLSelectedText(id)
{
var ctl = document.getElementById(id);
if(ctl)
{
return ctl.options[ctl.selectedIndex].text;
}
}


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if(document.mylist.length != "undefined" ) {} Õâ¸öÓ÷¨ÓÐÎó.
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2. <body onselectstart="return false"> È¡ÏûÑ¡È¡¡¢·ÀÖ¹¸´ÖÆ
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