任何人都可以幫我找到解決方案來驗證文本字段以接受有效的十進制數。我想是這樣在html輸入文本字段中避免兩位小數的javascript函數(例如:12.1.1)
function fun_AllowOnlyAmountAndDot(txt) {
if (event.keyCode > 47 && event.keyCode < 58 || event.keyCode == 46) {
var txtbx = document.getElementById(txt);
var amount = document.getElementById(txt).value;
var present = 0;
var count = 0;
if (amount.indexOf(".", present) || amount.indexOf(".", present + 1)); {
// alert('0');
}
/*if(amount.length==2)
{
if(event.keyCode != 46)
return false;
}*/
do {
present = amount.indexOf(".", present);
if (present != -1) {
count++;
present++;
}
}
while (present != -1);
if (present == -1 && amount.length == 0 && event.keyCode == 46) {
event.keyCode = 0;
//alert("Wrong position of decimal point not allowed !!");
return false;
}
if (count >= 1 && event.keyCode == 46) {
event.keyCode = 0;
//alert("Only one decimal point is allowed !!");
return false;
}
if (count == 1) {
var lastdigits = amount.substring(amount.indexOf(".") + 1, amount.length);
if (lastdigits.length >= 4) {
//alert("Two decimal places only allowed");
event.keyCode = 0;
return false;
}
}
return true;
} else {
event.keyCode = 0;
//alert("Only Numbers with dot allowed !!");
return false;
}
}
這有什麼做用PHP – Farkie
@Farkie然後重新標記,不downvote。 – Renan
我從來沒有下降過 - 我編輯和重新簽名。 – Farkie