// JavaScript Document
var maxx=0;
var maxy=0;

function get_maxs(){
 if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    maxx = window.innerWidth;
    maxy = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    maxx = document.documentElement.clientWidth;
    maxy = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    maxx = document.body.clientWidth;
    maxy = document.body.clientHeight;
  }
}

function img_on(img_src){
	get_maxs();
	var top=0;
	
	top=document.body.scrollTop;
	document.body.style.overflow="hidden";
	document.body.scrollTop=top;
	document.getElementById('bigimg_back').style.left='0px';
	document.getElementById('bigimg_back').style.top=document.body.scrollTop+'px';
	document.getElementById('bigimg_back').className='bigimg_back_on';
	document.getElementById('closediv').className='closediv_on';
	top=top+50;
	document.getElementById('bigimg').style.top=top+'px';
	document.getElementById('closediv').style.top=top+'px';
	center=maxx/2-250;
	document.getElementById('bigimg').style.left=center+'px';
	document.getElementById('closediv').style.left=center+'px';
	document.getElementById('bigimgsrc').src='thumb/thumb.php?img='+img_src+'&width=500&height=400';
	document.getElementById('bigimg').className='bigimg_on';
	
}

function img_off(){
	document.getElementById('bigimg_back').className='bigimg_back_off';
	document.getElementById('bigimg').className='bigimg_off';
	document.getElementById('closediv').className='closediv_off';
	document.body.style.overflow="auto";
}