var reg = new RegExp(/^([a-z]:((\\|\/|\\\\|\/\/))|(\\\\|\/\/))[^<>:"|?*]+/i);
var startList = [
'C://test',
'C://te?st.html',
'C:/test',
'C://test.html',
'C://test/hello.html',
'C:/test/hello.html',
'//test',
'/test',
'//test.html',
'//10.1.1.107',
'//10.1.1.107/test.html',
'//10.1.1.107/test/hello.html',
'//10.1.1.107/test/hello',
'//test/hello.txt',
'/test/html',
'/tes?t/html',
'/test.html',
'test.html',
'//',
'/',
'\\\\',
'\\',
'/t!esrtr',
'C:/hel**o'
];
startList.forEach(item => {
document.write(reg.test(item) + ' >>> ' + item);
document.write("<br>");
});