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diff --git a/web/src/cgi.tcl-1.10/example/validate.cgi b/web/src/cgi.tcl-1.10/example/validate.cgi
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+++ b/web/src/cgi.tcl-1.10/example/validate.cgi
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+#!/depot/path/tclsh
+
+# This CGI script uses JavaScript to validate a form before submission.
+
+package require cgi
+
+cgi_eval {
+    source example.tcl
+
+    cgi_input
+
+    cgi_head {
+	title "Using JavaScript to validate a form before submission"
+
+	javascript {
+	    puts {
+		function odd(num) {
+		    if (num.value % 2 == 0) {
+			alert("Please enter an odd number!")
+			num.value = ""
+			return false
+		    }
+		    return true
+		}
+	    }
+	}
+	noscript {
+	    puts "Sorry - your browser doesn't understand JavaScript."
+	}
+    }
+
+    set rownum 0
+    proc row {msg {event {}}} {
+	global rownum
+
+	incr rownum
+	table_row {
+	    table_data nowrap {
+		put  "Odd number: "
+		text num$rownum= size=4 $event
+	    }
+	    table_data {
+		puts $msg
+	    }
+	}
+    }
+
+    cgi_body {
+	set more ""
+	if {0 == [catch {import num3}]} {
+	    set count [scan $num3 %d num]
+	    if {($count != 1) || ($num % 2 == 0)} {
+		p "Hey, you didn't enter an odd number!"
+	    } else {
+		p "Thanks for entering odd numbers!"
+		set more " more"
+	    }
+	}
+
+	puts "Please enter$more odd numbers - thanks!"
+
+	cgi_form validate "onSubmit=return odd(this.num2)" {
+	    table {
+		row "This number will be validated when it is entered." onChange=odd(this.form.num1)
+		row "This number will be validated when the form is submitted."
+		row "This number will be validated after the form is submitted."
+	    }
+	    submit_button =Submit
+	}
+
+	h5 "Note: JavaScript validation should always be accompanied
+	by validation in the backend (CGI script) since browsers
+	cannot be relied upon to have JavaScript enabled (or supported
+	in the first place).  Sigh."
+    }
+}