用jq替换原本页面中有得onclick点击事件

<script>
   //javascript:location.href='/ServiceAction/com.velcro.workflow.workflow.servlet.WfViewAction?workflowid=e4e48163822a84e40182a5c82505186a&viewmode=0&editmode=1'
   var wfid=$('#workflowid').val();//流程id
   var projectid=$('#field_e4e48163787bf7780179eff0c8791d78').val();//项目id
   //跳转到新流程
     $("#button_E").attr("onclick", "");
    $("#button_E").bind("click", function() {
        javascript:location.href="/ServiceAction/com.velcro.workflow.workflow.servlet.WfViewAction?pipeid=e4e48163833fe7dc018421bd54ca0c61&wfid="+wfid+"&projectid="+projectid+"";
    });
</script>