jQuery plugin to remove classes with given prefix

gistfile1.js

// Remove classes that have given prefix
// Example: 
// You have an element with classes "apple juiceSmall juiceBig banana"
// You run:
// $elem.removeClassPrefix('juice');
// The resulting classes are "apple banana"

// NOTE: discussion of implementation techniques for this, including why simple RegExp with word boundaries isn't correct: 
// http://stackoverflow.com/questions/57812/jquery-remove-all-classes-that-begin-with-a-certain-string#comment14232343_58533

(function ( $ ) {

$.fn.removeClassPrefix = function (prefix) {
    this.each( function ( i, it ) {
        var classes = it.className.split(" ").map(function (item) {
           return item.indexOf(prefix) === 0 ? "" : item;
        });
        it.className = classes.join(" ");
    });

    return this;
}

})( jQuery );

Not sure, but I believe the problem may be that the map function is not supported in earlier versions of IE? Changing it to something like this should work:
var classes = it.className.split(" ");
$.map(classes, function(item) { ...

Hi Sarink, i think you are right...but some how i found different code which is little bit lengthy but working fine in all the versions of IE and chrome...... Below code i am using,have a look:-
$.fn.removeClassPrefix = (function(oldRemoveClass){
return function(){
// Turn arguments into a true array
var args = Array.prototype.slice.call(arguments);
var class_list = args[0];
var classes = class_list.split(' ');
var new_class_list = [];
var get_rid = [];
var $t = $(this);
for(var i = 0, clen = classes.length; i < clen; i++){
if(classes[i].indexOf('') !== -1){
var c_stripped = classes[i].replace('_', '');
$t.filter('[class*="' + c_stripped + '"]').each(function(){
var cl = this.className.split(' ');
for(var j = 0, jlen = cl.length; j < jlen; j++){
if(cl[j].indexOf(c_stripped) !== -1){
get_rid.push(cl[j]);
}
};
});
}
else {
new_class_list.push(classes[i]);
}
}
args[0] = $.merge(new_class_list, get_rid).join(' ');
return _oldRemoveClass.apply(this, args);
};
})($.fn.removeClass);

This is awesome and does what I need.... I did notice that in Safari at least, for some reason extra spaces were being appended in the string as the class changed. I changed line 18 to:

it.className = $.trim(classes.join(" "));

And that seems to have resolved the issue.

I am almost sure, that problem with IE occured because of "each" function, earlier versions of IE doesn't support it. The workaround is to use normalized jQuery $.each instead. Like $.each(this,function(i, it){})