Need help in validating empty reference field

[Tanya10]

Hello All,
I have a use case, where I have to check for condition if parent field is empty or not.
1) If parent field is not empty then I have to call my script include.

2) If parent field is empty, then do nothing.

I have to check these things as soon as form load, so I'm using onload client script, but it is not checking the empty for parent field empty everytime it goes for another condition. Can anyone help hea?

Note: Everytime it is going in else section.

function onLoad() {
 var parentField = g_form.getValue('parent');
    alert(parentField);
    if( g_form.getValue('parent')== undefined){
        
        alert("Empty");
        
    }else{
    
        alert("Glideajax");
        var ga = new GlideAjax('x_kpm14_security_i.PopulateTaskType');   //Scriptinclude
    ga.addParam('sysparm_name', 'getUserDetails'); //Method
    ga.addParam('parentID',parentField); //Parameters
    ga.getXMLAnswer(getResponse);
    }    

[Akif_Shah · Accepted solution]

Can you try

function onLoad() {
 var parentField = g_form.getValue('parent');
    alert(parentField);
    if( g_form.getValue('parent') == ""){
        
        alert("Empty");
        
    }else{
    
        alert("Glideajax");
        var ga = new GlideAjax('x_kpm14_security_i.PopulateTaskType');   //Scriptinclude
    ga.addParam('sysparm_name', 'getUserDetails'); //Method
    ga.addParam('parentID',parentField); //Parameters
    ga.getXMLAnswer(getResponse);
    }   

[Tanya10]

sorry for misunderstanding. 

I copy pasted wrong one. Correct if condition below:

 var parentField = g_form.getValue('parent');
    
    if( parentField== ''){
        
        alert("Empty");

}

[Tanya10]

Got it. Thanks

[Yousaf]

Hi,

Can you please try 

 if( g_form.getValue('parent')== ''){

in place of undefined

Mark Correct or Helpful if it helps.