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<form  id="loginForm" method="post" onsubmit="return false;">
		<div>
			<input type="text" name="userid" id="userid" class="userid" placeholder="id" autocomplete="off" onfocus="" onblur="" /><!-- autocomplete="off" 關(guān)閉自動補(bǔ)全 -->
		</div>
		<div>
			<input type="text" name="username" id="username" class="username" placeholder="用戶名" autocomplete="off" onfocus="" onblur="" />
		</div>
		<div>
			<input type="password" name="password" id="password" class="password" placeholder="密碼" oncontextmenu="return false" onpaste="return false"  />
			<!-- oncontextmenu="return false"關(guān)閉右鍵打開菜單功能 onpaste="return false"關(guān)閉粘貼功能 -->
		</div>
		<button id="submit" type="submit" onclick="mysubmit();">登 錄</button>
	</form>

表單結(jié)構(gòu)

function mysubmit(){
				var xhr ;

				if (window.XMLHttpRequest)
				{
				    //  IE7+, Firefox, Chrome, Opera, Safari 瀏覽器執(zhí)行代碼
				    xhr=new XMLHttpRequest();
				}
				else
				{
				    // IE6, IE5 瀏覽器執(zhí)行代碼
				    xhr=new ActiveXObject("Microsoft.XMLHTTP");
				}
				xhr.open("POST","http://localhost/graduationProject/server/login.php",true);
				xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded");
				xhr.send("userid=1111&username=1111&password=1111");

		// body...
	}

ajax請求

瀏覽器報錯：index.html:1 http://localhost/graduationProject/server/login.php? ???? ?????: 'http://localhost/graduationProject?? ????' /server/login.php'?? 'http://localhost/graduationProject/browser/flappybirds/index.html'?? ??? CORS ??? ?? ???????. ??? ???? 'Access-Control-Allow-Origin' ??? ????. ??? ?? 'null'?? ???? ???? ????.