function GoodPart (){
var part = document.part_search.Part.value;
   if ( part ==  "Enter Part Number here!"){
        alert ("Please Enter a Part Number in this field.");
        document.part_search.Part.focus == true;
        return false;
     }
}

function GoodModel (){
   var model = document.model_search.Model.value;
   if ( model ==  "Enter Model Number here!"){
        alert ("Please Enter a Model Number in this field.");
        document.model_search.Model.focus == true;
        return false;
     }
   return true;
}