<script language="javascript">
 //防止页面后退
 history.pushState(null, null, document.URL);
 window.addEventListener('popstate', function () {
   history.pushState(null, null, document.URL);
 });
</script>

$(function(){
 if (window.history && window.history.pushState) {
   history.pushState(null, null, document.URL);
   window.addEventListener('popstate', forbidBack);
 }
})
/**
 * 禁止回退按钮
 */
function forbidBack(){
 appUtils.mobileConfirm("确定放弃重置密码?",function(){//yes
  window.removeEventListener('popstate',forbidBack);
  muiwindow.muiwebview({"url":"login.html"});
 },function(){//no
  //防止页面后退
  history.pushState(null, null, document.URL);
 });
}