Nickname validation javascript December 12, 2007

function Check(form)
{
value=form.nickname.value

var valid=/^[0-9a-zA-Z_]*$/;

if(value!=”"&& !valid.test(value))
{
form.nickname.style.background = “#FFCCCC”;
alert(” field must contain only alphabets,numbers and underscore.\n”);
return false;
}
return true;
}