jQuery.fn.PraznoPolje = function (Polje,ID) {
    if(Polje == ""){
        $(ID).animate({
            width: '30%'
        },200),
        $(ID).animate({
            width: '98%'
        },200,function(){
            $(ID).css("background","url(Images/pozadina_err.jpg) top left repeat-x")
        })
    }else{
        return true;
    }
}

jQuery.fn.NeValjaJedan = function (Polje,ID) {

        $(ID).animate({
            width: '30%'
        },200),
        $(ID).animate({
            width: '98%'
        },200,function(){
            $(ID).css("background","url(Images/pozadina_err.jpg) top left repeat-x")
        })

}