Web-dev/test.html at master · true1ck/Web-dev · GitHub

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Mobile No. Validation</title>
<script type="text/javascript">
function validateMobNo(mobno){
    var mobno2;
    var flag=false;
    var mlen= mobno.length;
    //alert(mobno.substr(3,mobno.length-3));
    if(mobno.charAt(0)!='+' && mlen==10){
        mobno2="+91-"+mobno;
        alert("your mobile wants to be "+mobno2);
        flag=true;
    }
    else
        alert("Please correct your mobile No");


}
</script>
</head>
<body>

<form name="mobvalidate">
<input type="text" id="mobno" />
<input type="button" value="VALIDATE" onclick="validateMobNo(mobno.value)" />
</form>
</body>
</html>