$ 0 0 submit与onsubmit发生顺序:onsubmit -gt; submit1.阻止表单提单:lt;scriptgt;function submitFun(){//逻辑判断return true; //允许表单提交//逻辑判断return false;//不允许表单提交}lt;/scriptgt;lt;form onsubmit=rdquo; reture submitFun();rdquo;