大学教务系统javascript一键评价脚本

期末了，又要写上教务系统写评价，好烦，人懒表示不想点。可以通过浏览器的控制台一键评价：

var iframe = document.getElementById('iframeautoheight');var innerDoc = iframe.contentDocument || iframe.contentWindow.document;var selects = innerDoc.getElementsByTagName('select');var scorelist = [];for (var i = 0; i < selects.length; i++) {if (selects[i].id.indexOf("DataGrid1__") > -1) {scorelist.push(selects[i]);}
}
var rid = Math.floor(Math.random()*scorelist.length);
for (var i = 0; i < scorelist.length; i++) {var ops = scorelist[i].options;for (var j = 0; j < ops.length; j++) {var tempValue = ops[j].value;if (i == rid) {if (tempValue == '4(良好)') {  //这里的字符串要对应你学校教务系统的字符串。ops[j].selected = true;break;}} else {if (tempValue == '5(优秀)') { ops[j].selected = true;break;}}}
}
var textarea = innerDoc.getElementById("pjxx");
textarea.value = "春蚕到死丝方尽，蜡炬成灰泪始干";  //修改教师评价请改这里
var btn_save = innerDoc.getElementById('Button1');
btn_save.click();