how to check for a specific value in a lookup field?

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I'm attempting to check for a value via a lookup field, and if the value is the value I am looking for, make another field on the form required.

The second part is no problem, it's the checking to see if a specific value for the lookup was selected.

I'm using dynamics crm 2011 on premise and I've done a lot of research, finding a lot of different code, I either get an error or when I input an alert I get prompt saying [object Object] from the code below.. Please help!

function namelocationrequired() {

var lookup = Xrm.Page.getAttribute("new_csiapprovedtradeshows").getValue();

/*
             if (lookup != null) {
                 var name = lookup[0].name;
                 var id = lookup[0].id;
                 var entityType = lookup[0].entityType;

                          alert(name);
                          alert(id);
                          alert(entityType);

                    }
*/

               alert(lookup);

}

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a33ik 84,331 Most Valuable Professional on at

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How do you plan to compare - by id or name? If you want to compare by id you can use something like:

var lookup = Xrm.Page.getAttribute("new_csiapprovedtradeshows").getValue(); if (lookup == null){ //lock your second field here return; } if (lookup[0].id == "Your guid for comparing here"){ //unlock your second field here } else { //lock your second field here }

For name you can use almost the same code changing lookup[0].id to lookup[0].name

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Andrii I switched id out with name, the name is 'Other Trade Show Not Listed'

I don't really need to look for a null value since it's an onChange event do I? Can I remove that part of the code?

I'm testing now. Thanks!

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never mind I think I understand now. If lookup equals null I need to set new_othertradeshownameandlocation to not required.

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ANDRII Thank you! With your help, I got it to work properly!

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