//
// Javascript functions for JASA site
// rjw 2/07
//


//
// Dreamweaver functions
//
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_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_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_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];}
}


//
// Check if PNGs need to be fixed, and if so, calls correctPNG() (see pngfix.js)
//
function fixpng() {
  if (typeof needtofixpng != undefined && needtofixpng)
    correctPNG();
}


//
// Primary navigation mouseovers
// This could *almost* be done with CSS alone, except for quirks of IE6
// which don't allow for :hover on the nested services menu. Safer with Javascript.
//

// mouseover for a regular link
//
function navover(obj) {
  if (obj.className != "current")
    obj.className = "over";
}
// mouseout for a regular link
//
function navout(obj) {
  if (obj.className == "over")
    obj.className = "out";
}

// over/out of the main services link
//
function servicesover() {
  var menuobj = MM_findObj("servicesmenu");
  if (menuobj && menuobj.className != "current") {
    menuobj.className = "over";
  }
}
function servicesout() {
  var menuobj = MM_findObj("servicesmenu");
  if (menuobj && menuobj.className == "over") {
    menuobj.className = "out";
  }
}

// over/out of a services sub-link
//
function servicessubover(obj) {
  servicesover();
  if (obj.className != "current")
    obj.className = "over";
}
function servicessubout(obj) {
  servicesout();
  if (obj.className == "over")
    obj.className = "out";
}


//
// Random photos
//
// home page
function write_random_home_photo() {
  var randphotos = new Array("img/home/photo1.jpg","img/home/photo2.jpg","img/home/photo3.jpg","img/home/photo4.jpg");
  var nphoto = Math.floor(Math.random()*randphotos.length);
  document.writeln("<div id='divphoto'><img src='"+randphotos[nphoto]+"' width='632' height='462' alt='' title='' /></div>");
}



//
// Apply styles to striped table rows
//
var stripedtableclassnameregexp = /\bstripedtable\b/;
function stripetables() {
  var t, tables = document.getElementsByTagName("table");
  for (t = 0; t < tables.length; t++) {
    if (tables[t].className.search(stripedtableclassnameregexp) >= 0) {
      var i, rows = tables[t].rows;
      for (i = 0; i < rows.length; i++) {
        if (i % 2 == 0) {
          rows[i].className = "odd";
        }
        else {
          rows[i].className = "even";
        }
      }
    }
  }
}