| lordx78 | Mar 23rd, 2008 6:10 am | |
| Float value checking
<html>
<head>
<script type="text/javascript">
function validateFloat()
{
var o = document.frmInput.txtInput;
switch (isFloat(o.value))
{
case true:
alert(o.value + " is an float")
break;
case false:
alert(o.value + " is not an float")
}
}
</script>
</head>
<body>
<form name="frmInput">
Enter something: <input name="txtInput" size="4">
<input type="button" value="Validate" onclick="validateFloat()"></input>
</form>
</body>
</html>
Not working. pls help |
| Suomedia | Mar 23rd, 2008 2:37 pm | |
| Re: Float value checking
The isFloat function is missing.
Matti Ressler
Suomedia |
| lordx78 | Mar 24th, 2008 7:10 am | |
| Re: Float value checking
can u help me to solve isFloat, pls. |
| Suomedia | Mar 24th, 2008 12:13 pm | |
| Re: Float value checking
This is rather simple (eg, it will return a.b as a float):
function isFloat(value) {
if (/\./.test(value)) {
return true;
} else {
return false;
}
}
Google is your friend to find a more comprehensive float checking function.
Matti Ressler
Suomedia |
| ~s.o.s~ | Mar 30th, 2008 2:22 pm | |
| Re: Float value checking
A thorough way of doing it would be:
/**
* Checks if a given string is float or not
*
* @author sos
* @param {String} val The string in question.
*/
function isFloat(val) {
if(!val || (typeof val != "string" || val.constructor != String)) {
return(false);
}
var isNumber = !isNaN(new Number(val));
if(isNumber) {
if(val.indexOf('.') != -1) {
return(true);
} else {
return(false);
}
} else {
return(false);
}
} |
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