Check If Data In Certain Textbox Is A Number

[houssam_ballout]

Hello I had a web form, there is a field that should contain only numbers, so how can I check if the field contains numbers?? (not decimals)Thanks

[jeffman]

function isInt (n) {   return Number(n) % 1 == 0;}

More explanation here: isInt. The link even shows you how to reprototype the String object if you expect to do this operation frequently.