function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function showHide(id) {	
  w1 = document.getElementById (id);
  if (w1.style.display == "none") w1.style.display="block";
  else w1.style.display="none";	
}

function hide(id) {	
  w1 = document.getElementById (id);
  
  w1.style.display="none";	
}

function show(id) {	
  w1 = document.getElementById (id);
  
  w1.style.display="block";	
}

function openwindow (url, winname, w, h) {
  var nScrW = 800;
  var nScrH = 600;
  if (screen) {
    nScrW = screen.availWidth;
    nScrH = screen.availHeight;
  }
  var leftPos = (nScrW-w)/2;
  var topPos = (nScrH-h)/2;
  window.open (url, winname, 'width=' + w + ',height=' + h + ',menu=no,toolbars=no,status=yes,scrollbars=yes,resizable=yes,top=' + topPos + ',left=' + leftPos);
  
  return;
}

function checkEmail (str) {
  var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
  return emailPattern.test(str); 
}


//jQuery image preloader
(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
    var args_len = arguments.length;
    for (var i = args_len; i--;) {
      var cacheImage = document.createElement('img');
      cacheImage.src = arguments[i];
      cache.push(cacheImage);
    }
  }
})(jQuery)