From this link we know about function "setValue" of rich:autocomplete component.

But this method not working in Safari and Chromium browsers and works fine in Firefox.

Example:

{code}
#{rich:component('id_component')}.setValue(null)
{code}

After this call in Firefox input value is erased, but in Chromium(maybe in Chrome too) and Safari nothing happens(value not erasing).

To fix this, we must modify AutocompleteBase.js file:

Find "updateInputValue" function:

{code}
var updateInputValue = function (value) {
    if (this.fieldId) {
        rf.getDomElement(this.fieldId).value = value;
        return value;
    } else {
        return "";
    }
};
{code}

and replace as below:

{code}
var updateInputValue = function (value) {
    if (this.fieldId) {
        $(rf.getDomElement(this.fieldId)).val(value);
        return value;
    } else {
        return "";
    }
};
{code}

Main idea is to use .val() function of jQuery insted ".value=" .

P.S. I use Richfaces 4.3.1