Ajax zapisování

<input type="text" onkeyup="document.getElementById('doplnit').value=this.value">
<input type="text" id="doplnit">

<script>
    function VymazExtraZnaky(val,obj){
        //kopiruje zmenene val do obj.value
        val=val.replace(/\[/gi,"\\[");
        val=val.replace(/\]/gi,"\\]");
        val=val.replace(/\&/gi,"[AND_GLOBAL_CHAR]");
        val=val.replace(/\\t/gi,"[TAB_GLOBAL_CHAR]");
        val=val.replace(/\#/gi,"[SHARP_GLOBAL_CHAR]");
        var x;
        (XMLHttpRequest)?x=new XMLHttpRequest():x=new ActiveXObject("Microsoft.XMLHTTP");
        x.onreadystatechange=function(){
            if(x.status==200 && x.readyState==4){
                obj.value=x.responseText;
            }
        }
        x.open("GET","check.php?text="+val,true);
        x.send();
    }
</script>
<input type="text" onkeyup="VymazExtraZnaky(this.value,document.getElementById('out'));">
<input type="text" id="out">

<?php
function utf2ascii($text)
    {
        $return = Str_Replace(
                        Array("á","č","ď","é","ě","í","ľ","ň","ó","ř","š","ť","ú","ů","ý","ž","Á","Č","Ď","É","Ě","Í","Ľ","Ň","Ó","Ř","Š","Ť","Ú","Ů","Ý","Ž") ,
                        Array("a","c","d","e","e","i","l","n","o","r","s","t","u","u","y","z","A","C","D","E","E","I","L","N","O","R","S","T","U","U","Y","Z") ,
                        $text);
        $return = Str_Replace(Array(" ", "_"), "-", $return); //nahradí mezery a podtržítka pomlčkami
        $return = Str_Replace(Array("(",")",".","!",",","\"","'"), "", $return); //odstraní ().!,"'
        $return = StrToLower($return); //velká písmena nahradí malými.
        return $return;
    } 
    $text=str_replace(array("[AND_GLOBAL_CHAR]","[SHARP_GLOBAL_CHAR]","[TAB_GLOBAL_CHAR]"),array("&","#","\t"),$_GET["text"]);
    $text=str_replace(array("\\[","\\]"),array("[","]"),$text);
    echo utf2ascii($text);
?>

<script>
    function utf2ascii(text) {
        var ret=text;
        var ret =ReplaceArrayJS(new Array("á","č","ď","é","ě","í","ľ","ň","ó","ř","š","ť","ú","ů","ý","ž","Á","Č","Ď","É","Ě","Í","Ľ","Ň","Ó","Ř","Š","Ť","Ú","Ů","Ý","Ž") ,new Array("a","c","d","e","e","i","l","n","o","r","s","t","u","u","y","z","A","C","D","E","E","I","L","N","O","R","S","T","U","U","Y","Z") ,ret);
        var ret = ReplaceArrayJS(new Array(" ", "_"), "-", ret); //nahradí mezery a podtržítka pomlčkami
        var ret = ReplaceArrayJS(new Array("(",")",".","!",",","\"","'"), "", ret); //odstraní ().!,"'
        var ret = ret.toLowerCase(); //velká písmena nahradí malými.
        return ret;
    } 
    function ReplaceArrayJS(farr,sarr,text){
        var fal=farr.length;
        var sal=sarr.length;
        var wArray=true;
        var wText="";
        if(sal==0)
            wArray=false;
        else if(sal==1){
            wArray=false;
            wText=sarr;
        }
        var ntext=text;
        for(var i=0;i<fal;i++){
            for(var j=0;j<text.length;j++){
                if(!wArray)
                    ntext=ntext.replace(farr[i],(wText===undefined)?"":wText);
                else
                    ntext=ntext.replace(farr[i],(sarr[i]===undefined)?"":sarr[i]);
            }
        }
        return ntext;
    }
    function VymazExtraZnaky(val,obj){
        obj.value=utf2ascii(val);
    }
</script>
<input type="text" onkeyup="VymazExtraZnaky(this.value,document.getElementById('out'));">
<input type="text" id="out">