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: temperature
CanSubmit = ForceRange("Step", "Step size");
if (!CanSubmit) return;

//Check a range has been entered for: scale (low)
CanSubmit = ForceRange("Start", "Start");
if (!CanSubmit) return;

//Check a range has been entered for: scale (high)
CanSubmit = ForceRange("Length", "Length");
if (!CanSubmit) return;

//Check a range has been entered for: increment
CanSubmit = ForceRange("Hide", "Hidden numbers");
if (!CanSubmit) return;

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

} //end function