Question

I have changed this.value = terms.join( "; " ) line from comma (,) to (;)
It worked for me for first suggestion. but after semicolon when I type new word no suggestion is shown.I have downloaded jQueryUI demo

 select: function( event, ui ) {
                var terms = split( this.value );
                // remove the current input
                terms.pop();
                // add the selected item
                terms.push( ui.item.value );
                      // add placeholder to get the comma-and-space at the end
                terms.push( "" );
                this.value = terms.join( "; " );
                return false;
}  

Answer 1

function split( val ) {
        return val.split( /\;\s*/ );
    }

Change this function as I have written above…