var nowZoom = 100; // 현재비율 
var maxZoom = 200; // 최대비율(500으로하면 5배 커진다) 
var minZoom = 80; // 최소비율 

//화면 키운다. 
function zoomIn() 
{ 
    if (nowZoom < maxZoom) 
    { 
        nowZoom += 10; //25%씩 커진다. 
    } 
    else 
    { 
        return; 
    } 
    document.body.style.zoom = nowZoom + "%"; 
} 


//화면 줄인다. 
function zoomOut() 
{ 
    if (nowZoom > minZoom) 
    { 
        nowZoom -= 10; //25%씩 작아진다. 
    } 
    else 
    { 
        return; 
    } 
    document.body.style.zoom = nowZoom + "%"; 
} 

//화면 원래대로 
function zoomDefault() 
{ 
    nowZoom = 100; 
    document.body.style.zoom = nowZoom + "%"; 
} 

var fSize = 12;
function scaleFont(n){
	fSize = fSize + n;
	var objTd = document.getElementsByTagName( "td" );// <td>, <TD>의 내용을 모두 읽어옴
	var objDiv = document.getElementsByTagName( "div" );
	var objSpan = document.getElementsByTagName( "span" );
	var objA = document.getElementsByTagName( "a" );
	var objs = document.getElementsByTagName( "p" );
	var objli = document.getElementsByTagName( "li" );
	for( i=0; i < objDiv.length; i++ )	objDiv[i].style.fontSize = fSize + "px";
	for( i=0; i < objTd.length; i++ )	objTd[i].style.fontSize = fSize + "px";
	for( i=0; i < objSpan.length; i++ )	objSpan[i].style.fontSize = fSize + "px";
	for( i=0; i < objA.length; i++ )	objA[i].style.fontSize = fSize + "px";
	for( i=0; i < objs.length; i++ )	objs[i].style.fontSize = fSize + "px";
	for( i=0; i < objli.length; i++ )	objli[i].style.fontSize = fSize + "px";
}

function scaleFontDefault(){
	fSize = 12;
	var objTd = document.getElementsByTagName( "td" );// <td>, <TD>의 내용을 모두 읽어옴
	var objDiv = document.getElementsByTagName( "div" );
	var objSpan = document.getElementsByTagName( "span" );
	var objA = document.getElementsByTagName( "a" );
	var objs = document.getElementsByTagName( "p" );
	var objli = document.getElementsByTagName( "li" );
	
	for( i=0; i < objDiv.length; i++ )	objDiv[i].style.fontSize = fSize + "px";
	for( i=0; i < objTd.length; i++ )	objTd[i].style.fontSize = fSize + "px";
	for( i=0; i < objSpan.length; i++ )	objSpan[i].style.fontSize = fSize + "px";
	for( i=0; i < objA.length; i++ )	objA[i].style.fontSize = fSize + "px";
	for( i=0; i < objs.length; i++ )	objs[i].style.fontSize = fSize + "px";
	for( i=0; i < objli.length; i++ )	objli[i].style.fontSize = fSize + "px";
}