function closeBox(){
		document.getElementById('mask').style.display='none';
		document.getElementById('mask_box').style.display='none';
	}

	function openBox(){
	    //
		document.getElementById('mask').style.display='';
		document.getElementById('mask_box').style.display='';
		document.getElementById("mask").style.height=document.body.scrollHeight+"px";
		document.getElementById("MemberName").focus();
		scall();
	}

	
	function scall(){
		document.getElementById("mask_box").style.top=(document.documentElement.scrollTop+(document.documentElement.clientHeight-document.getElementById("mask_box").offsetHeight)/2)+"px";
		document.getElementById("mask_box").style.left=(document.documentElement.scrollLeft+(document.documentElement.clientWidth-document.getElementById("mask_box").offsetWidth)/2)+"px";
	}

window.onscroll=scall;
window.onresize=scall;
//window.onload=scall;