確認郵件刪除按鈕

Question

下面的代碼是我在JavaScript中的功能我想單擊刪除按鈕後確認郵件。

的JavaScript

function deleteValues() 
{ 

    var regno = document.getElementById('regs_numb').value; 
    var patId =document.getElementById('Pat_Id').value; 
    if(regno ==""||isNaN(regno)) 
    { 
     var el = document.createElement("div"); 
     el.setAttribute("style","position:absolute;top:15%;left:80%;background-color:white;height:50px;width:150px;"); 
     el.innerHTML = "please enter register number"; 
     setTimeout(function(){ 
      el.parentNode.removeChild(el); 
     },2000); 
     document.body.appendChild(el); 
     return false; 
    } 
    else if(patId =="") 
    { 
     var el1 = document.createElement("div"); 
     el1.setAttribute("style","position:absolute;top:15%;left:80%;background-color:white;height:50px;width:150px;"); 
     el1.innerHTML = "please enter patient id "; 
     setTimeout(function(){ 
      el1.parentNode.removeChild(el1); 
     },2000); 
     document.body.appendChild(el1); 
     return false; 
    } 
    else 
    {  
     document.forms[0].action="deletePatient?regs_numb="+document.getElementById('regs_numb').value+"&&Pat_Id="+document.getElementById('Pat_Id').value; 
     document.forms[0].submit(); 
     return true; 
    } 
} 

Answer 1

我會confirm方法檢查了JavaScript的編譯。

var s = confirm("Are you sure you want to do this?"); 
if(s){ 
    // Proceed 
}else{ 
    // Uh oh, go back! 
} 

在這裏看到更多的信息：https://developer.mozilla.org/en-US/docs/Web/API/Window.confirm

Answer 2

這是一個簡單的解決方案

function ConfirmDelete() 
{ 
    var x = confirm("Are you sure you want to delete?"); 
    if (x) 
     return true; 
    else 
    return false; 
} 


<input type="button" Onclick="ConfirmDelete()"> 

Answer 3

嘗試window.confirm（）方法。

例

var r = confirm("Delete?"); 
if (r == true) 
{ 
    //code to delete 
} 
else 
{ 
    //cancel 
} 

在 http://www.w3schools.com/jsref/met_win_confirm.asp

Answer 4

，而不是

else 
{ 
    document.forms[0].action="deletePatient?regs_numb="+document.getElementById('regs_numb').value+"&&Pat_Id="+document.getElementById('Pat_Id').value; 
    document.forms[0].submit(); 
    return true; 
} 

更多有類似

else 
{ 
    var isSure = confirm('Are you sure you want to delete ' + patId + '?'); 

    if (isSure) { 
     document.forms[0].action="deletePatient?regs_numb="+document.getElementById('regs_numb').value+"&&Pat_Id="+document.getElementById('Pat_Id').value; 
     document.forms[0].submit(); 
     return true; 
    } 
} 

這將彈出一個確認信息確定和取消按鈕。表單將提交只有在用戶點擊好

編輯：你也可以在這裏

document.forms[0].action="deletePatient?regs_numb="+document.getElementById('regs_numb').value+"&&Pat_Id="+document.getElementById('Pat_Id').value; 
         // ------------------------------------------------------------------------^ You have 2 "&" symbols