HTML <button>标签
如果<button>标签在<form>中不加type=“button”,那么默认含义是“submit”。
<button>标签里面disabled属性使其不可用,常见javascript修改disabled属性实例:(a键b键互相撕逼)
<style> #a,#b { height:30px; width:70px; background:yellow; box-sizing:border-box; } </style> </head> <body> <button type="button" id="a" onclick="an()" >会变色</button> <button type="button" id="b" onclick="bn()" >会变色</button> <script> function bn() { if(document.getElementById("b").disabled!="true") { document.getElementById("b").disabled="true"; document.getElementById("b").style.background="gray"; document.getElementById("a").removeAttribute("disabled"); document.getElementById("a").removeAttribute("style"); } else { document.getElementById("a").disabled="true"; document.getElementById("a").style.background="gray"; document.getElementById("b").removeAttribute("disabled"); document.getElementById("b").removeAttribute("style"); } } function an() { if(document.getElementById("a").disabled!="true") { document.getElementById("a").disabled="true"; document.getElementById("a").style.background="gray"; document.getElementById("b").removeAttribute("disabled"); document.getElementById("b").removeAttribute("style"); } else { document.getElementById("b").disabled="true"; document.getElementById("b").style.background="gray"; document.getElementById("a").removeAttribute("disabled"); document.getElementById("a").removeAttribute("style"); } } </script> </body>