Editable Form calculations

Custom calculation scripts:

//LTV

var AsIs=this.getField("As Is Value").value;
if(!AsIs){event.value=""}
else
{
event.value=(this.getField("Total Loan Amount").value -
this.getField("Construction Holdback").value)/AsIs;
}

//LTC
var AsIs=this.getField("As Is Value").value;
if(!AsIs){event.value=""}
else
{
event.value=this.getField("Total Loan Amount").value/AsIs;
}

//LTARV
var arv=this.getField("After Repair Value").value;
if(!arv){event.value=""}
else
{
event.value=this.getField("Total Loan Amount").value/arv;
}