javascript - How to check if a comma was used in an input tag? -

i have few input tags, , ajax script converts values string separated commas before sending php script. if uses comma in input tags, breaks read method, values broken. tags aren't meant text, , there no reason use one, in case, how check if user used comma, using jquery.

ideally, want:

$('element').keyup(function(event) {       if(){//previous value comma         alert('commas not allowed!!');         //code delete comma       }     }); 

thanks.

you can use indexof on value of current input value.

 if(this.value.indexof(',') !== -1)  {     //comma in input not allowed   }