Array filter and callback functions
function checkColor(element,index,array) {
return (element >= 0 && element < 256);
}
var colors = new Array( );
colors[0] = [0,262,255];
colors[4] = [0,0,255];
colors[5] = [-5,567,255];
var testedColors = new Array( );
for (var i in colors) {
testedColors[i] = colors[i].filter(checkColor);
document.write(testedColors[i]);
}