Not able to get Lookup field value in Sharepoint 2

问题:

I have one lookup column named "ActivityStatus" and it has two values. and I just want to check that lookup field value on Presave Action. Below is my code but it is not working.

<script type="text/javascript">
function PreSaveAction() 
{
    alert("Inside");
    var elm = document.getElementById("ActivityStatus");
    alert(elm);
    if (elm == "Incomplete" || elm == "Inprogress")
    {
       document.getElementById("ActivityStatus").style.display='none';
       alert("Previous Activity is in Progress...");
       return false ;
    }
    else
    { 
      return true ;
    }
}
</script>

回答1:

The way you are getting lookup value will not work.

you have to do something as below. As it is rendered as a Select tag.

Refer below code :

function PreSaveAction() 
{

    var elm = document.getElementById("plpace ID your control Here");
    var elmValue = elm.options[elm.elmectedIndex].text.trim();

    if (elmValue == "Incomplete" || elmValue == "Inprogress")
    {
       // 
       //  your other code
       //
    }
    else
    { 
      return true ;
    }
}

Here in variable selectedValue you will get actual value.

And replace the ID accordingly for your control..