Grid 中调用模式窗口

{sName: "productId","bSortable":false, "sColumnDataType":'link',
        "sColumnDataTypePro":{'url':"javascript:findmodel('<c:out value="${context_path }"/>/k4_oldGoldStorsge/oldGoldDetail/{id}');",'name':'productId'},aTargets: [2]},


function findmodel(url){
      var rs = window.showModalDialog(url,"dialogWidth=" + 500 + "px;dialogHeight=" + 90 + "px");
 }