Duda con los formularios de menus desplegables - Java y Javascript

RE: Duda con los formularios de menus desplegables
Veamos, lo que necesitas es mas o menos un carrito de compras, verdad?. Te puedo ayudar con este script, que hace lo q quieres, solo cambiale los nombres y precios de tus productos.
Codigo:

<!-- PRIMER PASO: Copiar dentro del tag HEAD -->



<script LANGUAGE="JavaScript">





var called=false;	

var T_Price=0;

var Line1_flag;

var Line1_print="";

var Line2_flag;

var Line2_print;

var Line3_flag;

var Line3_print;

var Line4_flag;

var Line4_print;

var Line5_flag;

var Line5_print;

var Line6_flag;

var Line6_print;

function compute(form){

called=true;

//-------Productos 1----------

if (form.Productline1[0].selected){

	Line1_print= "Ninguno [$0]";

	Line1_flag=0;

}

	 

 if (form.Productline1[1].selected){

	Line1_flag =84.95;

	Line1_print="Producto 1 [$84.95]";

}

else if (form.Productline1[2].selected){

	Line1_flag =84.95;

Line1_print="Producto 2 [$84.95]";

}

	

else if (form.Productline1[3].selected){

	Line1_flag =54.95;

	Line1_print="Producto 3 [$54.95]";

}

	

else if (form.Productline1[4].selected){

	Line1_flag =54.95;

	Line1_print="Producto 4 [$54.95]";

}

else if (form.Productline1[5].selected){

	Line1_flag =19.95;

	Line1_print="Producto 5 [$19.95]";

}

//-------Productos 2----------

if (form.Productline2[0].selected){

	Line2_flag=0;

	Line2_print="Ninguno [$0]";

}

if (form.Productline2[1].selected){

	Line2_flag=150;

Line2_print="Producto 1 [$150]";

}

if (form.Productline2[2].selected){

	Line2_flag=250;

Line2_print="Producto 2 [$250]";

}

if (form.Productline2[3].selected){

	Line2_flag=350;

Line2_print="Producto 3 [$350]";

}

//-------Productos 3-----------

if (form.Productline3[0].selected){

	Line3_flag=0;

	Line3_print="Ninguno [$0]";

}

if (form.Productline3[1].selected){

	Line3_flag=10;

Line3_print="Producto 1 [$10]";

}

if (form.Productline3[2].selected){

	Line3_flag=20;

Line3_print="Producto 2 [$20]";

}

if (form.Productline3[3].selected){

	Line3_flag=30;

Line3_print="Producto 3 [$30]";

}

//-------Productos 4-------

if (form.Productline4[0].selected){

	Line4_flag=0;

Line4_print="Ninguno [$0]";

}

if (form.Productline4[1].selected){

	Line4_flag=100;

Line4_print="Producto 1 [$100]";

}

if (form.Productline4[2].selected){

	Line4_flag=200;

Line4_print="Producto 2 [$200]";

}

if (form.Productline4[3].selected){

	Line4_flag=300;

Line4_print="Producto 3 [$300]";

}

//-------Productos 5-------

if (form.Productline5[0].selected){

	Line5_flag=0;

	Line5_print="Ninguno [$0]";

	}

if (form.Productline5[1].selected){

	Line5_flag=50;

	Line5_print="Producto 1 [$50]";

	}

if (form.Productline5[2].selected){

	Line5_flag=60;

	Line5_print="Producto 2  [$60]";

	}

if (form.Productline5[3].selected){

	Line5_flag=70;

	Line5_print="Producto 3 [$70]";

	}

//-------Productos 6-------

if (form.Productline6[0].selected){

	Line6_flag=0;

	Line6_print="Ninguno [$0]";

	}

if (form.Productline6[1].selected){

	Line6_flag=75;

Line6_print="Producto 1 [$75]";

	}

if (form.Productline6[2].selected){

	Line6_flag=85;

	Line6_print="Producto 2 [$85]";

	}

if (form.Productline6[3].selected){

	Line6_flag=95;

	Line6_print="Producto 3 [$95]";

	}

T_Price=Line1_flag+Line2_flag+Line3_flag+Line4_flag+Line5_flag+Line6_flag;

form.T_Price.value="  $ "+ T_Price;

}

function print(form){

if(!called){

	compute(form);

}

text = ("<HEAD><TITLE>'Costo Estimado'</TITLE></HEAD>");

text = (text +"<BODY BGCOLOR =  '#FFFFFF' ><CENTER><B><FONT SIZE = 3><FONT COLOR=BLUE>Costo Estimado</FONT></FONT></B>");

text= (text +"<br></CENTER>");

text=(text+"<hr>");

text=(text+"<TABLE BORDER =0><TR VALIGN=Top><TD VALIGN=Top>");

text=(text+"<B>Producto 1:<BR>Producto 2: <BR>Producto 3: <BR>Producto 4: <BR>Producto 5: <BR>Producto 6:");

text=(text+"</B></TD><TD>")

text=(text+"<B>"+ Line1_print+"<BR>"+ Line2_print+"<BR>"+ Line3_print+"<BR>");

text=(text+ Line4_print+"<BR>"+ Line5_print+"<BR>"+ Line6_print+"<BR>");

text=(text+"<TD></TR></TABLE><hr>");

text=(text+"<B><FONT COLOR=RED>Costo Total:</FONT>"+"       $"+T_Price);

text=(text+"</body></html>");

                msgWindow=window.open("","displayWindow","toolbar=no,width=320,height=240,directories=no,status=no,scrollbars=no,resize=no,menubar=no")

                msgWindow.document.write(text)

                msgWindow.document.close()

}

</script>



<!-- SEGUNDO PASO: Copiar dentro del tag BODY -->



<form method="post">

  <table cellpadding="4" bgcolor="#EAE8E8">

    <tr>

      <td><font face="Arial" size="2">Productos 1<br>

      <select name="Productline1" size="1">

        <option selected value="Seleccione">Libros</option>

        <option value="Producto 1 [$84.95] ">Producto 1 [$84.95]</option>

        <option value="Producto 2 [$84.95] ">Producto 2 [$84.95]</option>

        <option value="Producto 3 [$54.95] ">Producto 3 [$54.95]</option>

        <option value="Producto 4 [$54.95] ">Producto 4 [$54.95]</option>

        <option value="Producto 5 [$19.95] ">Producto 5 [$19.95]</option>

      </select></font></td>

      <td><font face="Arial" size="2">Productos 2<br>

      <select name="Productline2" size="1">

        <option selected value="CD-Roms">CD-Roms</option>

        <option value="Producto 1 [$150] ">Producto 1 [$150]</option>

        <option value="Producto 2 [$250] ">Producto 2 [$250]</option>

        <option value="Producto 3 [$350] ">Producto 3 [$350]</option>

      </select></font></td>

      <td><font face="Arial" size="2">Productos 3<br>

      <select name="Productline3" size="1">

        <option selected value="Postales">Postales</option>

        <option value="Producto 1 [$10] ">Producto 1 [$10]</option>

        <option value="Producto 2 [$20] ">Producto 2 [$20]</option>

        <option value="Producto 3 [$30] ">Producto 3 [$30]</option>

      </select></font></td>

    </tr>

    <tr>

      <td><font face="Arial" size="2">Productos 4<br>

      <select name="Productline4" size="1">

        <option selected value="Llaveros">Servicios</option>

        <option value="Producto 1 [$100] ">Producto 1 [$100]</option>

        <option value="Producto 2 [$200] ">Producto 2 [$200]</option>

        <option value="Producto 3 [$300] ">Producto 3 [$300]</option>

      </select></font></td>

      <td><font face="Arial" size="2">Productos 5<br>

      <select name="Productline5" size="1">

        <option selected value="Software">Software</option>

        <option value="Producto 1 [$50] ">Producto 1 [$50]</option>

        <option value="Producto 2 [$60] ">Producto 2 [$60]</option>

        <option value="Producto 3 [$70] ">Producto 3 [$70]</option>

      </select></font></td>

      <td><font face="Arial" size="2">Productos 6<br>

      <select name="Productline6" size="1">

        <option selected value="Hardware">Hardware</option>

        <option value="Producto 1 [$75] ">Producto 1 [$75]</option>

        <option value="Producto 2 [$85] ">Producto 2 [$85]</option>

        <option value="Producto 3 [$95] ">Producto 3 [$95]</option>

      </select></font></td>

    </tr>

    <tr>

      <td colspan="3"><table cellpadding="2">

        <tr>

          <td><font size="1"><br>

          </font><input type="button" name="Price" value="Costo Total" onclick="compute(this.form)"><font

          size="1"> </font><input type="text" size="12" name="T_Price" value></td>

          <td valign="top"><font size="1"><br>

          </font><input type="button" name="Print_data" value="Ver Detalles"

          onclick="print(this.form)">  <input type="button" value="Enviar"

          onMouseup="javascript:alert('Esto es una prueba')"></td>

        </tr>

        <tr>

          <td></td>

          <td valign="top"></td>

        </tr>

      </table>

      </td>

    </tr>

  </table>

</form>
Espero q te esto te sea util.