JS : Snippet Query Focus on input text

gistfile1

$(document).ready(function() {
    $.fn.setCursorPosition = function(pos) {
        if ($(this).get(0).setSelectionRange) {
            $(this).get(0).setSelectionRange(pos, pos);
        } else if ($(this).get(0).createTextRange) {
        var range = $(this).get(0).createTextRange();
        range.collapse(true);
        range.moveEnd('character', pos);
        range.moveStart('character', pos);
        range.select();
        }
    }
    $("#signup label&quot.each(function (i) {
        $(this).next("input&quot.attr("value",$(this).html()+"..."
        $(this).hide();
    });
    $("#signup input&quot.focus(function() {
        if($(this).prev("label&quot.html()+"..." == this.value){
            $(this).addClass("focus&quot.setCursorPosition(0);
        }
    });
    $("#signup input&quot.keypress(function() {
        if($(this).prev("label&quot.html()+"..." == this.value){
            this.value = "";
            $(this).removeClass("focus&quot.addClass("typing"
        }
    });
    $("#signup input&quot.blur(function() {
        $(this).removeClass("focus&quot.removeClass("typing"
        if(this.value == "&quot{
        this.value = $(this).prev("label&quot.html()+"...";
        }
    });
});