Usefull JavaScript’s & jQuery Code

#1 create a prototype function for e.g. a replaceAll function for strings:

String.prototype.replaceAll = function(search, replacement) {
     var target = this;
     return target.replace(new RegExp(search, 'g'), replacement);
};

Useage:

var test1, test2;

var str = „aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa“

test =  str .replaceAll("a", "c")
"cccccccccccccccccccccccccccccc"

//combineable
test2 =  str.replace("a", "b") .replaceAll("a", "c") 
"bccccccccccccccccccccccccccccc"

jQuery

Example:

$("body").find("div").each(function() {
    $(this).setRandomColor();
});

Add a Function to jQuery

$.fn.setRandomColor = function() {
    function getRandomColor() {
        var letters = '0123456789ABCDEF';
        var color = '#';
        for (var i = 0; i < 6; i++) {
            color += letters[Math.floor(Math.random() * 16)];
        }
        return color;
    };

    this.css("color", getRandomColor());
};

function escapeHtml(unsafe) {
return unsafe
.replace(/&/g, "&")
.replace(/</g, "&lt;")
.replace(/>/g, "&gt;")
.replace(/"/g, "&quot;")
.replace(/'/g, "&#039;");
}
};