function ValidateData() {

//Submission variable
var CanSubmit = false;

//Check to make sure that the worksheet title field is not empty.
CanSubmit = ForceEntry("WorksheetTitle", "Please enter a title for the worksheet.");
if (!CanSubmit) return;

// check numeric entries are numeric 
CanSubmit = ForceNumber("QuestionCount", "Number of questions");
if (!CanSubmit) return;

//Check a range has been entered for: grid width / height
CanSubmit = ForceRange("GridWidth", "Grid width");
if (!CanSubmit) return;
CanSubmit = ForceRange("GridHeight", "Grid height");
if (!CanSubmit) return;

//Check a range has been entered for: fill percent
CanSubmit = ForceRange("FillPercent", "Pictures in grid (as a percentage)");
if (!CanSubmit) return;

//If fields have been entered correctly, submit the form
if (CanSubmit) document.LayoutWorksheet.submit();

} //end function