// onFocus="this.blur()" ÀÚµ¿ Àû¿ë
function bluring(){ 
if(event.srcElement.tagName=="A"||event.srcElement.tagName=="IMG") document.body.focus(); 
} 
document.onfocusin=bluring;

// ÀÚ¹Ù½ºÅ©¸³Æ® ¿À·ù¾ø¾Ö±â
function blockError(){return true;}
window.onerror = blockError;
show&hide

function layer_toggle(obj) {
        if (obj.style.display == 'none') obj.style.display = 'block';
        else if (obj.style.display == 'block') obj.style.display = 'none';
}