function fun1(proid,sizeid){
$.getJSON("Product/price",{"proid":proid,"psid":sizeid},function(data){
alert(data);
});
}
<dl class="clearfix iteminfo_parameter sys_item_specpara" data-sid="2">
<!-- <dt>尺码</dt> -->
<dd>
<ul class="sys_spec_text">
<c:forEach items="${pslist}" var="prosize" varStatus="ss">
<c:if test="${ss.index==0}">
<li class="sys_item_specpara" οnclick="javascript:fun1('${pro.productid}','${prosize.productsizeId}');"
id="${pslist[0].productsizeId}" ><a href="javascript:fun1();"
title="${prosize.productsizeId}">${pslist[0].productsizeName}</a><i></i>
</li>
</c:if>
<c:if test="${ss.index!=0}">
<li data-aid="17" class="sys_item_specpara" value="${prosize.productsizeId}"><a href="javascript:;"
title="${prosize.productsizeId}">${prosize.productsizeName}</a><i></i>
</li>
</c:if>
</c:forEach>
</ul>
</dd>
</dl>
使用方法时需要在前面加上"javascript:"