我有一個JavaScript驗證的窗體。有3個帶問題的下拉(選擇)字段和3個帶答案的輸入字段。javascript validate select dropdown
有什麼辦法來驗證選擇字段,以便他們沒有相同的問題?
這裏是我的代碼
<script type="text/javascript">
var errmsg;
function validate()
{
var textA= document.getElementById("text1");
var textB= document.getElementById("text2");
var textC = document.getElementById("text3");
var textD = document.getElementById("text4");
var textE = document.getElementById("text5");
var textF = document.getElementById("text6");
var txt1 = document.getElementById("text1").value;
var txt2 = document.getElementById("text2").value;
var txt3 = document.getElementById("text3").value;
var txt4 = document.getElementById("text4").value;
var txt5 = document.getElementById("text5").value;
var txt6 = document.getElementById("text6").value;
var txt1_len = txt1.length;
var txt2_len = txt2.length;
var txt3_len = txt3.length;
var txt4_len = txt4.length;
var txt5_len = txt5.length;
var txt6_len = txt6.length;
if(txt1_len == '')
{
errmsg = "Please select a question";
document.getElementById("ermsg").innerHTML = errmsg;
textA.focus();
return false;
}
else if(txt2_len == 0 || txt2_len > 23 || txt2_len < 3)
{
errmsg = "Invalid Answer";
document.getElementById("ermsg").innerHTML = errmsg;
textB.focus();
return false;
}
else if(txt3_len == '')
{
errmsg = "Please select a question";
document.getElementById("ermsg").innerHTML = errmsg;
textC.focus();
return false;
}
else if(txt4_len == 0 || txt4_len > 23 || txt4_len < 3)
{
errmsg = "Invalid Answer";
document.getElementById("ermsg").innerHTML = errmsg;
textD.focus();
return false;
}
else if(txt5_len == '')
{
errmsg = "Please select a question";
document.getElementById("ermsg").innerHTML = errmsg;
textE.focus();
return false;
}
else if(txt6_len == 0 || txt6_len > 23 || txt6_len < 3)
{
errmsg = "Invalid Answer";
document.getElementById("ermsg").innerHTML = errmsg;
textF.focus();
return false;
}
else
{
return true;
}
return false;
}
</script>
然後將HTML代碼
https://jsfiddle.net/johnmathew21/ty999fkv/
爲什麼你不使用簡單的jQuery表單驗證,而不是寫這個冗長的代碼.. –
我得到了很久很久以前,我必須改變很多頁面,如果我替換這個:( – johnmathew21
好吧,讓我試試??你發佈你的所有選擇字段 –