Untitled

<html>
<head>
<script content="text/javascript">
function validVarsta(s,a,b){
	var numar = parseInt(s.value);
	if(!numar)
		alert("Va rog scrieti un numar.");
	else
		if(numar < a)
			alert("Va rog scrieti un numar mai mare ca " + a);
		else
			if(numar > b)
				alert("Va rog scrieti un numar mai mic ca " + b);
			else
				return true;
	return false;
}
function validEmail(s)
{
	if(s.value.indexOf("@") == -1)
	{
		alert("Email-ul introdus nu este valid.");
		return false;
	}
	return true;
}
</script>
</head>
<body>
<form>
nume: <input type="text" name="nume"/>
<br />
prenume: <input type="text" name="prenume"/>
<br />
varsta:<input type="text" name="varsta" onchange="validVarsta(this.form.varsta, 18, 21)"/>
<br />
email:<input type="text" name="email" onchange="validEmail(this.form.email)" />

<br />
numar de telefon:<input type="text" name="nrtel" onchange="validVarsta(this.form.nrtel, 1000000000, 9999999999)"/>
<br />
</form>
</body>
</html>