I'v created an associative array which associates each GIcon with one of my strings but i run encountering error and i have no clue what's going on..... can any one helppppp....

Here is my code
var iconBlue = new GIcon();
iconBlue.image = images/mm_20_blue.png';
iconBlue.shadow = images/mm_20_shadow.png';
iconBlue.iconSize = new GSize(12, 20);
iconBlue.shadowSize = new GSize(22, 20);
iconBlue.iconAnchor = new GPoint(6, 20);
iconBlue.infoWindowAnchor = new GPoint(5, 1);

var iconRed = new GIcon();
iconRed.image = images/mm_20_red.png';
iconRed.shadow = images/mm_20_shadow.png';
iconRed.iconSize = new GSize(12, 20);
iconRed.shadowSize = new GSize(22, 20);
iconRed.iconAnchor = new GPoint(6, 20);
iconRed.infoWindowAnchor = new GPoint(5, 1);

var customIcons = [];
customIcons["English"] = iconBlue;
customIcons["Franch"] = iconRed;