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var itm = document.thisItem;
var inn = itm.getInnovator();

// if is_current property exists in the cache, use it
var isCurr = itm.getProperty("is_current","");

// else, retrieve is_current from the database
if(isCurr === ""){
    itm = inn.getItemById(itm.getID());
    isCurr = itm.getProperty("is_current", "");
}

// set form background color if the item is not current
var formBody = document.getElementsByTagName("body")[0];
if (isCurr == "0") {
    formBody.style.backgroundColor = "#EFEFEF";
}