java and javascript helper: September 2011

Thursday 29 September 2011

Alphanumeric validation

function alphanumeric(event)
{

if((!(event.keyCode>=48 && event.keyCode <=57))&&(!(event.keyCode>=65 && event.keyCode <=90))&&(!(event.keyCode>=97 && event.keyCode <=122)))
{
return false;
}
}

Numeric Validation

function numbersonly(event)
{

if(!(event.keyCode>=48 && event.keyCode <=57))
{
return false;
}
}

for example:
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script>
function numbersonly(event)
{

if(!(event.keyCode>=48 && event.keyCode <=57))
{
return false;
}
}

</script>
</head>

<body>
<input type="text" name="strtxt" id="strtxt" onkeypress="return numbersonly(event);"/>
</body>
</html>

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