javascript not returni true對錶單驗證

Question

function validation() { 
    //alert("in the validation") 
    var rty = document.getElementById("city").value; 
    var stt = document.getElementById("stt").value; 
    var t = document.getElementById("gst").value; 
    var clnm = document.getElementById("clname").value; 
    var errorstring = ""; 
    //alert("clnm" + clnm); 
    if (clnm == "" || clnm == null) { 
    errorstring += "Please enter Client Display Name\n"; 
    } 

    var clbill = document.getElementById("clbillname").value; 
    //alert("cbil" + clbill); 
    if (clbill == "" || clbill == null) { 
    errorstring += "Please enter Client Bill Name\n"; 

    } 
    var cladd = document.getElementById("claddress").value; 
    //alert("cadd" + cladd); 
    if (cladd == "" || cladd == null) { 
    errorstring += "Please enter Client Billing Address\n"; 

    } 

    if (rty == "" || rty == null) { 
    errorstring += "Please enter City\n"; 

    } 
    //alert("reached near"+stt); 
    if (stt.trim() == "ALL") { 
    // alert("reached inside"); 
    errorstring += "Please select a state\n"; 

    } 
    //alert("reached here"); 
    var tt = document.getElementsByName("gstreg"); 
    if (tt[0].checked) { 
    //alert("reached inside"); 
    if (t == null || t == "") { 
     errorstring += "Please Enter GST TIN\n"; 

    } 
    } 

    alert("validation"); 
    if (errorstring != "") { 
    alert(errorstring); 
    return false; 
    } else { 
    return true; 
    } 

上述代碼在每件事情都是正確的時候沒有返回true。 我調用這個函數的提交按鈕的點擊，但我仍無法得到保存爲表單中的值不提交

的JavaScript函數就是在任何情況下

Answer 1

確保條件是返回true內部功能...

檢查是否你的函數在codepen正確關閉

function validation() { 
your code... 

if (errorstring != "") { alert(errorstring); return false; } else { return true; } 

}