function check(str)
{
var ind = ''
var tar = ''
var signal
var i = 0
var allow = ''
str = '' + str
allow = '1234567890abcdefghijklmnopqrstuvwxyz'
signal = false
for (i=0;i
{
ind = str.substring(i,i+1)
for (j=0;j {
tar = allow.substring(j,j+1)
signal = false
if (ind == tar)
{
signal=true
break
}
}
if (signal==false)
break;
else continue
}
return signal
}TextText