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Get order guide sys id in the catalog item client script--how to tell in catalog item scripts if part of an order guide or standalone

How to tell in catalog item scripts if part of an order guide or standalone

below does not work in service portal


top.location will be

for service portal

top.location will be https://<instance url>/sp?id=sc_cat_item_guide&sys_id=7d292af7371c57008ca1138943990e7d

var res_orderguide=getP();
if (res_orderguide ){
        //--form is part of order guide
        g_form.setReadOnly('line_manager', true);
        g_form.setReadOnly('requested_for', true);
        g_form.setReadOnly('job_title', true);

function getP(){
    var isPartOfGuide=false;
        var urlString=top.location.toString();
        //return urlString;
            //--service portal view
            //--standard servicenow view
        alert(getPVal('sc_cat_item_guide'));//--to get order guide ID--portal friendly
        alert(getPVal('sysparm_guide'));//--to get order guide ID--non portal friendly
    }catch (ex){
    return (isPartOfGuide);

function getPVal (name){
    var parms = decodeURI("&").map(makeParmObjList);
    function makeParmObjList(item){
        var keyPair = item.split('=');
        return {field: keyPair[0], value: keyPair[1]};
        //--courtesy of




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