var zoomValue =1;
function scrollTop()
{
	
var scrollPos; 
if (typeof window.pageYOffset != 'undefined') { 
   scrollPos = window.pageYOffset; 
} 
else if (typeof document.compatMode != 'undefined' && 
     document.compatMode != 'BackCompat') { 
   scrollPos = document.documentElement.scrollTop; 
} 
else if (typeof document.body != 'undefined') { 
   scrollPos = document.body.scrollTop; 
} 
return(scrollPos);		
}

//select the target option 
// arg1: select obj or name
// arg2: now value, String 
function selectOption(loopobj,nowvalue)
{
if(nowvalue==null || nowvalue=="" ) return false;
loopobj = $(loopobj)
for (j = 0; j < loopobj.length;j++)
    {			
        if(loopobj.options[j].value== nowvalue )
		{loopobj.options[j].selected=true;
		return false;
		}
    }	
}


function tools_zoomIn()
{
	zoomValue=1;
	$('main').style.zoom=zoomValue;	
	$('left').style.zoom=zoomValue;
	$('mid').style.zoom=zoomValue;
	$('right').style.zoom=zoomValue;
	Element.toggle("zoomin","zoomout");

}

function tools_zoomOut()
{
	zoomValue=0.55;
	$('main').style.zoom=zoomValue;	
	$('left').style.zoom=zoomValue;
	$('mid').style.zoom=zoomValue;
	$('right').style.zoom=zoomValue;
	Element.toggle("zoomin","zoomout");
}