Answer / shwetha kamath

function validate_user_editadvanced_form_username(element)
{var valid = "0123456789"
var ok = "yes";
var temp;
for (var i=0; i<element.value.length; i++) {
temp = "" + element.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if (ok == "no") {
alert("Invalid entry! Only numbers are accepted!");
element.focus();
element.select();
}
}

Answer / kevin konkle

//Have this be called off the keypress event of your
textbox control.
function numberFormat(fld, e)
{
var key = '';

//This string contains all characters you want to allow
var strCheck = '0123456789';
var whichCode = (window.Event) ? e.which : e.keyCode;

if (whichCode == 13) return true; // Enter
if (whichCode == 8) return true; // Delete

// Get key value from key code
key = String.fromCharCode(whichCode);

// Not a valid key
if (strCheck.indexOf(key) == -1) return false;

//If it is a legal value then add it to the text box
fld.value += key;

return false;
}

Answer / satish reddy

function isNumeric(keyCode)

{

if(keyCode==16)

isShift = true;



return ((keyCode >= 48 && keyCode <= 57 || keyCode ==
8 ||

(keyCode >= 96 && keyCode <= 105)) && isShift
== false);

}

sample code to auto focusing the first field in a form

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