// Return browser position X,Y, size width, height.
function getWindowSize() {
  var myWidth = 0, myHeight = 0;
  if (typeof (window.innerWidth) == 'number') {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if (document.documentElement) {
    if (document.documentElement.clientWidth || document.documentElement.clientHeight) {
      //IE 6+ in 'standards compliant mode'
      myWidth = document.documentElement.clientWidth;
      myHeight = document.documentElement.clientHeight;
    }
  } else if (document.body) {
    if (document.body.clientWidth || document.body.clientHeight) {
      //IE 4 compatible
      myWidth = document.body.clientWidth;
      myHeight = document.body.clientHeight;
    }
  }
  var winX = (document.all)?window.screenLeft:window.screenX;
  var winY = (document.all)?window.screenTop:window.screenY;
  return [winY, winX, myWidth, myHeight];
}

// Set preferences with the defaults. 
function setDefaults() {
  document.getElementById("formBrowserPrefs:itemsPerPageSel").options[3].selected=true;
  document.getElementById("formBrowserPrefs:displayTypeSel").options[0].selected=true;
  document.getElementById("formBrowserPrefs:searchResultCompSel").options[0].selected=true;
  document.getElementById("formBrowserPrefs:chkBrowserSizePos").checked=true;
  
  // Set window's size/position default values
  document.getElementById("winTop").value=0;
  document.getElementById("left").value=0;
  document.getElementById("width").value=0;
  document.getElementById("height").value=0;
  
  return true;
}

function isChromeXP() {
    var ver = getInternetExplorerVersion();
    var os = navigator.appVersion;
    return ( os.indexOf("NT 5.1")!=-1 && os.indexOf("Chrome")!=-1 );    // If it's Crome on XP
}

function isIE8XP() {
    var ver = getInternetExplorerVersion();
    var os = navigator.appVersion;
    return ( os.indexOf("NT 5.1")!=-1 && ver ==8 ); // If it's IE 8 on XP
}

//Returns the version of Internet Explorer or a -1
//(indicating the use of another browser).
function getInternetExplorerVersion() {
    var rv = -1; // Return value assumes failure.
    if (navigator.appName == 'Microsoft Internet Explorer') {
         var ua = navigator.userAgent;
         var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
         if (re.exec(ua) != null)
           rv = parseFloat( RegExp.$1 );
    }
    return rv;
}

/************************ Standard References Logic. *************************/
var stdRef=null;  // Get a reference to the last ajax call to get std reference url.

// Open a PublicLaw at gpo based on congress/number found in an uscode standard reference.
function openPLaw(congress, number) {
    getPublicLaw(congress, number, "law");
    stdRef=setTimeout("validateURL()",500);
}

// Get the url of the current public law or statute given: congress-number or volume-page. 
function getPublicLaw(first, second, type) {
  var form = getSrcForm();
  form.first.value = first;
  form.second.value = second;
  form.type.value = type;
  form.url.value = "";
  form.stdRefBtn.click();
  return false;
}

//Verify if the url of the plaw was loaded.
function validateURL() {
    var value = getURLVal();
    if (value==null || value.length==0) {
        stdRef=setTimeout("validateURL()",500);
    } else {
        clearTimeout(stdRef);
        if (value=="DocNotFound") {
            alert("Document not found!");
        } else {
            width=1024;
            height=768;
            if (window.screen) {
                width = window.screen.availWidth;
                height = window.screen.availHeight;
            }
            var props = 'top=0,left=0,width='+width+',height='+height+',resizable=1';
            if (isIE8XP()) {
                var popup = window.open("","",props);
                popup.location.href=value;
                popup.focus();
            } else if (isChromeXP())
                window.open(value,"pdf download",props);
            else
                window.open(value,"",props);
        }
    }
}

function getSrcForm() {
  var srcForm=document.getElementById("formStdRef");
    if (srcForm == null) {
      srcForm=opener.document.getElementById("formStdRef");
      if (srcForm == null) {
        srcForm=opener.parent.document.getElementById("formStdRef")
        if (srcForm == null) {
          srcForm=opener.opener.document.getElementById("formStdRef")
          if (srcForm == null) {
            srcForm=opener.opener.parent.document.getElementById("formStdRef")
          }
        }
      }
    }

    return srcForm;
}

function getURLVal() {
  var srcForm=getSrcForm();
  if (srcForm == null) {
    return null;
  }
  return srcForm.url.value;
}