...in fact I�m not quite experienced enough to be a newbie. I�m trying to write a series of simple DTML Documents to learn syntax. I�ve read lots of Zope docs but haven�t found an example of add, subtract, multiply, divide. (Probably too simple.) Here�s my unsuccessful attempt in two DTML pages: Code for index_html <!--#var standard_html_header--> <h2><!--#var title_or_id--></h2> <p> This is the <!--#var id--> Document. <BLOCKQUOTE> <FORM ACTION="addTotal"> <P>Enter a number: <INPUT TYPE="text" SIZE="3" NAME="number1"></P> <P>Enter a number: <INPUT TYPE="text" SIZE="3" NAME="number2"></P> <P>Enter a number: <INPUT TYPE="text" SIZE="3" NAME="number3"></P> <INPUT TYPE="submit" VALUE="Compute"> </FORM> </p> </BLOCKQUOTE> <!--#var standard_html_footer--> /\/\/\/\/\/\ The above DTML Document seems to work OK. It calls the DTML Document addTotal which reads back the parameters OK but won�t sum them�no doubt because I�m using the wrong syntax. Here�s code for addTotal including my unsuccessful guesses. <!--#var standard_html_header--> <h2><!--#var title_or_id--></h2> <P>The first number is <!--#var number1--></P> <P>The second number is <!--#var number2--></P> <P>The third number is <!--#var number3--></P> The total is: <!--#var number1-->+<!--#var number2-->+<!--#var number3--><BR> Not!</P> <P>Perhaps the total is: <!-- expr="#var number1+#var number2+#var number3"--> <!-- #var expr="#var number1+#var number2+#var number3"--> <!-- #var expr(#var number1+#var number2+#var number3)--> <!-- #var expr(#var number1+#var number2+#var number3)--> <!-- expr(#var number1+#var number2+#var number3)--> <!-- expr("#var number1+#var number2+#var number3")--> <!-- #var expr(#var number1+#var number2+#var number3)--> <!-- #var expr("#var number1+#var number2+#var number3")--> <!-- expr(#var "number1"+"#var number2"+"#var number3")--> <!-- expr(#var "number1+#var number2+#var number3")--> <!-- #var expr(#var number1+#var number2+#var number3)--> <!-- #var expr("#var number1"+"#var number2"+"#var number3")--> <BR><BR>Still not!<BR><BR> <!--#var standard_html_footer--> /\/\/\/\ Can someone please write the correct sum expression for me? While you�re at it, how about the expression for finding the square root of one of the numbers? Thanks! === David Robson robson555@yahoo.com Computer Support Towson High School, MD, USA __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com