I want to prevent a user from entering in all of the same number. Example the user enters in all 2, IE: 22222222222
I want to display a msg.
How can I prevent the user from entering in all of the same numbers?
Note the user can enter in the same number more than once but the value in the txt box cannot contain only that one number
Code:<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
<script type="text/javascript">
function check_this(_obj) {
first_number = _obj.value.substr(0,1)
number_of_them = 0
for (i=0; i<_obj.value.length; i++)
{
if (_obj.value.substr(i,1) == first_number)
{
number_of_them++
}
}
if (number_of_them == _obj.value.length)
{
alert("cannot contain all the same number")
_obj.value = ""
}
}
</script>
</head>
<body>
<input type="text" value="22222" id="mytxtx" onBlur="check_this(this)">
</body>
</html>
It's quicker if you don't search the entire string.
Code:var first = value.substr(0,1);
for(var i = 1; i < value.length; ++i) {
if(value[i] != first) {
break;
}
}
if(i == value.length) {
alert("Everything the same");
}
It's quicker if you don't search the entire string.
Code:var first = value.substr(0,1);
for(var i = 1; i < value.length; ++i) {
if(value[i] != first) {
break;
}
}
if(i == value.length) {
alert("Everything the same");
}
Works fine only problem is if you leave the value empty you still get the same err msg. How can I prevent this? This is reference to the first solution by Acidic
just insert if IF like:
But I would use CB solution, it's quicker (and shorter code). You can still use the same IF statement I just gave.Code:if (_obj.value.length==0)
{
alert("You must enter numbers in this field")
}
else {
//Do the rest
}