Check box Validation
<html>
<head>
<title>Untitled Document</title>
</head>
<body>
<script>
function check(){
count = 0;
for(x=0; x<document.form1.checkbox.length; x++){
if(document.form1.checkbox[x].checked==true){
count++
}
}
if(count==0){
alert("You must choose atleast 1");
}
else if(count>3){
alert("You can only choose upto 3");
}
else {
alert("ok")
}
}
</script>
<form name="form1" id="form1" method="post" action="">
<input name="checkbox" value="red" /> Red<br />
<input name="checkbox" value="green" /> Green<br />
<input name="checkbox" value="blue" /> Blue<br />
<input name="checkbox" value="black" /> Black<br />
<input name="checkbox" value="white" /> White<br />
<input name="checkbox" value="yellow" /> Yellow<br />
<input name="checkbox" value="purple" /> Purple
<input name="Button" value="Click Me" onclick="check()" />
</form>
</body>
</html>
Textbox Validation for Alpha Numeric
<html>
<script>
function checkValue()
{
var m = document.test.ename.value;
var regexNum = /\d/;
var regexLetter = /[a-zA-z]/;
if(!regexLetter.test(m)){
alert('Type alpha character');
return false;
}
}
</script>
<body>
<form name="test">
<input name="ename")>
<input value="Check Value" onclick="checkValue()">
</form>
</body>
</html>
<html>
<head>
<title>Untitled Document</title>
</head>
<body>
<script>
function check(){
count = 0;
for(x=0; x<document.form1.checkbox.length; x++){
if(document.form1.checkbox[x].checked==true){
count++
}
}
if(count==0){
alert("You must choose atleast 1");
}
else if(count>3){
alert("You can only choose upto 3");
}
else {
alert("ok")
}
}
</script>
<form name="form1" id="form1" method="post" action="">
<input name="checkbox" value="red" /> Red<br />
<input name="checkbox" value="green" /> Green<br />
<input name="checkbox" value="blue" /> Blue<br />
<input name="checkbox" value="black" /> Black<br />
<input name="checkbox" value="white" /> White<br />
<input name="checkbox" value="yellow" /> Yellow<br />
<input name="checkbox" value="purple" /> Purple
<input name="Button" value="Click Me" onclick="check()" />
</form>
</body>
</html>
Textbox Validation for Alpha Numeric
<html>
<script>
function checkValue()
{
var m = document.test.ename.value;
var regexNum = /\d/;
var regexLetter = /[a-zA-z]/;
if(!regexLetter.test(m)){
alert('Type alpha character');
return false;
}
}
</script>
<body>
<form name="test">
<input name="ename")>
<input value="Check Value" onclick="checkValue()">
</form>
</body>
</html>