文件上传时form表单校验参数中断处理

表单提交按钮改成type="button" ,并添加此点击事件

function checkParam(){        var keyStorePsd = $('#keyStorePsd').val();        var keyPsd = $('#keyPsd').val();        var alias = $('#alias').val();        var apkFile = document.getElementById("apkFile");        var keyStoreFile = document.getElementById("keyStoreFile");        if(""==keyStorePsd){            alert("keystore password can't be null!");            return ;        }        if(""==keyPsd){            alert("key password can't be null!");            return ;        }        if(""==alias){            alert("alias can't be null!");            return ;        }        if(""==apkFile.value ){            alert("apk file can't be null!");            return ;        }        if(""==keyStoreFile.value ){            alert("keystore file can't be null!");            return ;        }        //大小限制//         var apkSize = apkFile.files[0].size;//         var keyStoreSize = keyStoreFile.files[0].size;        $('#form1').submit();    }