//如何禁用按钮
form1.btnUpload.disabled = "disabled";
//将按钮设为禁用
document.getElementById("Submit").setAttribute("disabled",true);
//将按钮设为禁用
document.getElementById("Submit").disabled=true;
//如何禁用按钮
form1.btnUpload.disabled = "disabled";
//将按钮设为禁用
document.getElementById("Submit").setAttribute("disabled",true);
//将按钮设为禁用
document.getElementById("Submit").disabled=true;