那么onclick的calculateprice你必须调用函数chkprice()

function chkpice()
    {
        var a=document.getElementById("options_1_text").value; 
        var b=document.getElementById("options_2_text").value; 
        var c=document.getElementById("options_3_text").value; 
        var d=document.getElementById("options_4_text").value; 
        var e=<?PHP echo $_product = $this->getProduct()->getPrice()?>;       
        var f=(a+b+c+d)+e;
        var e=document.getElementById(('product-price-'+<?PHP echo $_product = $this->getProduct()->getId()?>)).innerHTML;
        $('product-price-'+<?PHP echo $_product = $this->getProduct()->getId()?>).innerHTML =''+e.replace(<?PHP echo $_product = $this->getProduct()->getPrice()?>,d)+'</span>';
    }

设置了options_1_text,options_2_text,options_3_text,options_4_text把你的id将会得到你的结果