function ChanInput()
{
if(document.getElementById("Checkbox1").checked)
{document.getElementById("upFile").disabled = false;}
else
{document.getElementById("upFile").disabled = true;}
}
或者
function ChanInput()
{
document.getElementById("upFile").disabled = !document.getElementById("Checkbox1").checked;
}<input id="Checkbox1" type="checkbox" onclick="ChanInput()" checked="checked"/>
{
if(document.getElementById("Checkbox1").checked)
{document.getElementById("upFile").disabled = false;}
else
{document.getElementById("upFile").disabled = true;}
}
或者
function ChanInput()
{
document.getElementById("upFile").disabled = !document.getElementById("Checkbox1").checked;
}<input id="Checkbox1" type="checkbox" onclick="ChanInput()" checked="checked"/>
function ChanInput(){
var objDiv = document.getElementById("upFile");
var Checkbox=document.getElementById("Checkbox1").checked;
if(Checkbox==true){
objDiv.style.display="";
}else{
objDiv.style.display="none";
}
}
</script>
<input type="checkbox" id="Checkbox1" onclick="ChanInput()"/>
<input type="file" id="upFile" style="display:none"/>