function showBigimg() {
	var img = document.getElementById("bigimg");
	img.style.display = "block";
}
function hideBigimg() {
	var img = document.getElementById("bigimg");
	img.style.display = "none";
}	
function previewBig(url, width) {
  var img = document.getElementById("bigimg");
  img.src = '/pics/'+url;
  var scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
  }
  img.style.marginTop = scrOfY+'px';
    var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  if (width >= myWidth) {
    img.style.left = '0px';
    img.style.marginLeft = '0px';
  } else {
    img.style.marginLeft = '-'+Math.round(width/2)+'px';
    img.style.left = '50%';

  }
  img.style.display = "block";

}