[vickycool]

how to make a textbox to allow only one decimal point

[JMRKER]

Use .toFixed(1) when you set the value of the textbox.

[teampoop]

Another approach could be to split on the decimal points, and if the returned array length is more than 2, you have a fail.

s = "123.1123"; 
s2 = "123.123.13";

function howManyDecimals(i) {
  y = i.split(/\./);
  if(y.length>2) return "fail";
  return "happy";
}

document.write(howManyDecmials(s)); // happy
document.write(howManyDecimals(s2)); // fail

[JMRKER]

Quote

Another approach could be to split on the decimal points, and if the returned array length is more than 2, you have a fail.

Ahh... I thought OP was asking to limit output diplay, not limit input typed.

I guess you could say my thinking was limited!