Handle Multiple Demiliter Possibility Of Texterea?

Have an issue handling people using texterea to submit multiple id strings, I have to handle that not make what the user enters as delimiter, I have to pass it to comma delimiter to the back end. Basically I need to treat, ;, newline, returns, space, white space, blank etc to comma. Just wondering if there is an expression I can use.

str = document.mform.txtInput.value
function handleInput(str)
{
//remove unwanted space,change all delimiler to comma
}