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Pass radio button values to mailto body?

Ahelbling asked
Last Modified: 2012-02-09
Hello, can someone help me to figure out how to add the value of a set of radio buttons in a form to a mailto button onclick?  It works if I try a textbox value in the same form, but passes "UNDEFINED" when I try to pass the radio button value.

<form class="formular" id="DonateForm" name="DonateForm" method="post" action="GCP21Reg.asp">
	<table style="width: 100%;">
			<td class="FormSectionRows" colspan="2">
            <input type="radio" id="S1" name="AbsCat" value="S1" />S1 Biodiversity and Genetic Resources<br/>
            <input type="radio" id="S2" name="AbsCat" value="S2" />S2 Climate and Social Changes Impacting Cassava<br/>
            <input type="radio" id="S3" name="AbsCat" value="S3" />S3 Genomics and Gene Discovery Platforms<br/> 
            <input type="radio" id="S4" name="AbsCat" value="S4" />S4 Agronomy (Cassava Field Production)<br/>
            <input type="radio" id="S5" name="AbsCat" value="S5" />S5 CBSD and CMD and CBB<br/>
            <input type="radio" id="S6" name="AbsCat" value="S6" />S6 Enabling Transgenic and In vitro Technologies (includes haploids)<br/>
            <input type="radio" id="S7" name="AbsCat" value="S7" />S7 Physiology and Abiotic stress (includes PPD)<br/>
            <input type="radio" id="S8" name="AbsCat" value="S8" />S8 Modern Breeding (includes MAS, heterosis, transgenics)<br/>
            <input type="radio" id="S9" name="AbsCat" value="S9" />S9 Field Breeding<br/>
            <input type="radio" id="S10" name="AbsCat" value="S10" />S10 Metabolic Engineering (includes starch, biofuels, nutritional enhancement)<br/>
            <input type="radio" id="S11" name="AbsCat" value="S11" />S11 Cassava Delivery Chain<br/>
            <input type="radio" id="S12" name="AbsCat" value="S12" />S12 Cassava Value Chain<br/>
            <input type="radio" id="S13" name="AbsCat" value="S13" />S13 Cassava Genomics Workshop<br/>
			<td class="FormSectionRows" colspan="2" ><input id="Button1" type="button" value="Submit Abstract" onclick="parent.location='mailto:pcosgrove@danforthcenter.org?subject=GCP21 Abstract Submission&body='+DonateForm.AbsCat.value+''" /></td>

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