function checkCallYouSubmit() {

   var id = "callyouerror";
   var elem = document.getElementById(id);

   if (top.document.forms.callyou.name.value.length == 0) {
      setElemText(elem, "Please fill in your name");
      return false;
   }
   else if (top.document.forms.callyou.phone.value.length == 0) {
      setElemText(elem, "Please fill in your contact phone number");
      return false;
   }
   document.callyou.submit();
   return true;

}

function checkUploadSubmit() {

	var id = "uploaderror";
	var elem = document.getElementById(id);

   if (top.document.forms.upload.name.value.length == 0) {
      setElemText(elem, "Please fill in your name");
      return false;
   }
   else if (top.document.forms.upload.phoneno.value.length == 0) {
      setElemText(elem, "Please fill in your contact phone number");
      return false;
   }
    else if (top.document.forms.upload.uploadedfile.value.length == 0) {
      setElemText(elem, "Please choose the file you wish to upload");
      return false;
   }
   document.upload.submit();
   return true;

}

function setElemText(obj, text) {
   if (window.navigator.appName.toLowerCase().indexOf("netscape") > -1) {
           // Firefox
            obj.innerHTML = text; 
      }
      else {
          obj.innerText = text;
   }
}