Problema NaN

[jacin]

Código HTML:

<form name="form_evaluacion" method="post" action="index.php">
<input name="objetivos" id="objetivos" type="radio" class="radio" value="0.0" onClick="muestraValor('valor1',this.value);" >&nbsp;0.0

<div id="valor1" align="center" style="font-size:25px;font-weight:bold"></div>

<input name="objetivos" id="objetivos" type="radio" class="radio" value="0.1" onClick="muestraValor('valor1',this.value);sumaEval(0.1,0.2)" >&nbsp;0.1

<input name="objetivos" id="objetivos" type="radio" class="radio" value="0.2" onClick="muestraValor('valor1',this.value);sumaEval()" >&nbsp;0.2

<input name="objetivos" id="objetivos" type="radio" class="radio" value="0.3" onClick="muestraValor('valor1',this.value);sumaEval()" >&nbsp;0.3

<input name="objetivos" id="objetivos" type="radio" class="radio" value="0.4" onClick="muestraValor('valor1',this.value);sumaEval()" <?if($objetivos == 0.4)echo"checked"?> <?=$estado_select?>>&nbsp;0.4

<input name="org_log" type="radio" class="radio" value="0.0" onClick="muestraValor('valor2',this.value);sumaEval()" >&nbsp;0.0

<div id="valor2" align="center" style="font-size:25px;font-weight:bold"></div>

<input name="org_log" type="radio" class="radio" value="0.1" onClick="muestraValor('valor2',this.value);sumaEval()" >&nbsp;0.1

<input name="org_log" type="radio" class="radio" value="0.2" onClick="muestraValor('valor2',this.value);sumaEval()" >&nbsp;0.2

<input name="org_log" type="radio" class="radio" value="0.3" onClick="muestraValor('valor2',this.value);sumaEval()" >&nbsp;0.3

<input name="org_log" type="radio" class="radio" value="0.4" onClick="muestraValor('valor2',this.value);sumaEval()" >&nbsp;0.4

<input name="pertinencia" type="radio" class="radio" value="0.0" onClick="muestraValor('valor3',this.value);sumaEval()" >&nbsp;0.0

<div id="valor3" align="center" style="font-size:25px;font-weight:bold"></div>

<input name="pertinencia" type="radio" class="radio" value="0.1" onClick="muestraValor('valor3',this.value);sumaEval()" >&nbsp;0.1

<input name="pertinencia" type="radio" class="radio" value="0.2" onClick="muestraValor('valor3',this.value);sumaEval()" >&nbsp;0.2

<input name="pertinencia" type="radio" class="radio" value="0.3" onClick="muestraValor('valor3',this.value);sumaEval()" >&nbsp;0.3

<input name="pertinencia" type="radio" class="radio" value="0.4" onClick="muestraValor('valor3',this.value);sumaEval()" >&nbsp;0.4

<input name="metodologia" type="radio" class="radio" value="0.0" onClick="muestraValor('valor4',this.value);sumaEval()" >&nbsp;0.0

<div id="valor4" align="center" style="font-size:25px;font-weight:bold"></div>

<input name="metodologia" type="radio" class="radio" value="0.1" onClick="muestraValor('valor4',this.value);sumaEval()" >&nbsp;0.1

<input name="metodologia" type="radio" class="radio" value="0.2" onClick="muestraValor('valor4',this.value);sumaEval()" >&nbsp;0.2<

<input name="metodologia" type="radio" class="radio" value="0.3" onClick="muestraValor('valor4',this.value);sumaEval()" >&nbsp;0.3

<input name="metodologia" type="radio" class="radio" value="0.4" onClick="muestraValor('valor4',this.value);sumaEval()" >&nbsp;0.4

<input name="evaluacion" type="radio" class="radio" value="0.0" onClick="muestraValor('valor5',this.value);sumaEval()" >&nbsp;0.0

<div id="valor5" align="center" style="font-size:25px;font-weight:bold">
</div>

<input name="evaluacion" type="radio" class="radio" value="0.1" onClick="muestraValor('valor5',this.value);sumaEval()" >&nbsp;0.1

<input name="evaluacion" type="radio" class="radio" value="0.2" onClick="muestraValor('valor5',this.value);sumaEval()" >&nbsp;0.2

<input name="evaluacion" type="radio" class="radio" value="0.3" onClick="muestraValor('valor5',this.value);sumaEval()" >&nbsp;0.3

<input name="evaluacion" type="radio" class="radio" value="0.4" onClick="muestraValor('valor5',this.value);sumaEval()" >&nbsp;0.4

<div id="total" align="center" style="font-size:13px;font-weight:bold">&nbsp;</div>