Drop down selections to emails

var emailBody = "";
if (this.getField("1").valueAsString=="No")
emailBody = "Warning, there are scratches in panel work";

else if(this.getField("Serial No").value == "")
{
app.alert("Serial Number must be filled in");
}
else if(this.getField("Tyres").value == " ")
{
app.alert("Tyre size not selected");
}
else if(this.getField("Dropdown1").value == " ")
{
app.alert("Axle config not selected");
}

else if(this.getField("1").value == " ")
{
app.alert("Drawbar assembely cannot be left blank");
}
else if(this.getField("2").value == " ")
{
app.alert("Drawbar bolt kit cannot be left blank");
}
else if(this.getField("3").value == " ")
{
app.alert("Bale chute kit cannot be left blank");
}
else if(this.getField("4").value == " ")
{
app.alert("Computer kit cannot be left blank");
}
else if(this.getField("5").value == " ")
{
app.alert("C1000 harness cannot be left blank");
}
else if(this.getField("6").value == " ")
{
app.alert("Lighting/ Brake Harness kit cannot be left blank");
}
else if(this.getField("7").value == " ")
{
app.alert("Wide load boards cannot be left blank");
}
else if(this.getField("8").value == " ")
{
app.alert("Wide load board brakets cannot be left blank");
}
else if(this.getField("9").value == " ")
{
app.alert("Knotter flag kit cannot be left blank");
}
else if(this.getField("10").value == " ")
{
app.alert("Spares kits cannot be left blank");
}
else if(this.getField("11").value == " ")
{
app.alert("2290 Ladder kit cannot be left blank");
}
else if(this.getField("12").value == " ")
{
app.alert("pick up wheels cannot be left blank");
}
else if(this.getField("13").value == " ")
{
app.alert("Saftey Chain cannot be left blank");
}
else if(this.getField("14").value == " ")
{
app.alert("Beacon kit cannot be left blank");
}
else if(this.getField("15").value == " ")
{
app.alert("Operators manual cannot be left blank");
}
else if(this.getField("16").value == " ")
{
app.alert("EU Conformity cannot be left blank");
}
else
{// All is ok
this.mailDoc({cTo: "Email 1", cCc:"Email 2", cSubject: this.getField("Serial No").valueAsString, cMsg: emailBody})
}
;

Hello,

I cant seem to get it to work, it will email if the box is set to Yes however when set to No it will not submit?

also, is this method stackable i.e. if serveral selections are set to No will it put multi lines into the email?