function insert_text(el,ins){
    if(el.setSelectionRange){
        var selectedText=el.value.substring(el.selectionStart,el.selectionEnd);
        var poz=el.value.length;
        if(selectedText){
            ins=ins.replace(/_x_/,selectedText);
            if(ins.indexOf('!')==-1){
                poz=el.selectionStart+ins.length;
            }
            else{
                poz=el.selectionStart+ins.indexOf('!');
                ins=ins.replace(/!/,'');
            }
        }
        else{
            ins=ins.replace(/=!/,'');
            poz=el.selectionStart+(ins.indexOf('_x_')<0?0:ins.indexOf('_x_'));
            if(poz<0)
                poz=0;
            ins=ins.replace(/_x_/,'');
        }
        var storedTop=el.scrollTop;
        el.value=el.value.substring(0,el.selectionStart)+ins+el.value.substring(el.selectionEnd,el.value.length);
        el.focus();
        el.setSelectionRange(poz,poz);
        el.scrollTop=storedTop;
    }
    else if(document.selection&&document.selection.createRange){
        el.focus();
        var range=document.selection.createRange();
        var storedTop=el.scrollTop;
        var stored_range=range.duplicate();
        stored_range.moveToElementText(el);
        stored_range.setEndPoint('EndToEnd',range);
        el.selectionStart=stored_range.text.length-range.text.length;
        el.selectionEnd=el.selectionStart+range.text.length;
        if(range.text!=''){
            ins=ins.replace(/_x_/,range.text);
            if(ins.indexOf('!')==-1){
                poz=el.selectionStart+ins.length;
            }
            else{
                poz=el.selectionStart+ins.indexOf('!');
                ins=ins.replace(/!/,'');
            }
        }
        else{
            ins=ins.replace(/!/,'');
            poz=el.selectionStart+(ins.indexOf('_x_')<0?0:ins.indexOf('_x_'));
            if(poz<0)
                poz=0;
            ins=ins.replace(/_x_/,'');
        }
        range.text=ins;
        var newRange=el.createTextRange();
        newRange.moveStart('character',poz);
        newRange.collapse();
        newRange.select();
        el.focus();
        el.scrollTop=storedTop;
    }
}