function subWrapperHeight() {
   
	var currHeight = 0;
	var maxHeight = 0;
	pageColumns = new Array('rightColumn', 'subWrapper', 'centerColumn');
	
	for (i = 0; i < pageColumns.length; i++) {
		if (document.getElementById(pageColumns[i])) {
			document.getElementById(pageColumns[i]).style.height = "";
			currHeight = document.getElementById(pageColumns[i]).offsetHeight;
			if (currHeight > maxHeight) {
								
				maxHeight = currHeight;
			}
		}
		
	}
	
	for (i = 0; i < pageColumns.length; i++) {
		if (document.getElementById(pageColumns[i])) {
			if (document.getElementById(pageColumns[i]).offsetHeight < maxHeight) {
				document.getElementById(pageColumns[i]).style.height = maxHeight+"px";
			}
		}
	}
}

// tabbed interface


	function getValue(varname) {
  		// First, we load the URL into a variable
 		 var url = window.location.href;

 		 // Next, split the url by the ?
 		 /* alert(url.indexOf("?")); */
  		if (url.indexOf("?") != -1) {
  			var qparts = url.split("?");
  		}
  		else {
  			return false;
  		}

  		// Check that there is a querystring, return "" if not
  		if (qparts.length == 0) {
   			return "";
  		}

  		// Then find the querystring, everything after the ?
 		 var query = qparts[1];

  		// Split the query string into variables (separates by &s)
  		var vars = query.split("&");

  		// Initialize the value with "" as default
  		var value = "";

  		// Iterate through vars, checking each one for varname
  		for (i=0;i<vars.length;i++) {
   			 // Split the variable by =, which splits name and value
   			 var parts = vars[i].split("=");
    
   			 // Check if the correct variable
   			 if (parts[0] == varname)
    			{
    			  // Load value into variable
    			  value = parts[1];

     			 // End the loop
      			break;
    			}
 			 }
  
  // Convert escape code
  value = unescape(value);

  // Convert "+"s to " "s
  value.replace(/\+/g," ");

  // Return the value
  return value;
}

     var selectedTab = null;

      function showSection(tab, name) {
      
      var detailSections = document.getElementById("tabRow").childNodes;
      /*alert(detailSections.length);*/
      
      
	  var whichTab = document.getElementById(tab)
        if (selectedTab) {
          selectedTab.className = 'tabbedInterfaceTabsInactive'
		}
		
        selectedTab = whichTab;
		selectedTab.className = 'tabbedInterfaceTabsActive'
        
        
		for(j = 1; j < detailSections.length+1; j++) {
          if (document.getElementById("section"+j)) {
          document.getElementById("section"+j).style.display = (name == "section"+j) ? 'block':'none';
        }
      }
      
      subWrapperHeight();
     }
     
     
     function showFirstSection() {
      	
      	var jumpToPanel = getValue("panel");
      	var jumpToAnchor = getValue("anchor");
      
      	if(jumpToPanel != '' && jumpToPanel != null) {
      		
      		viewTab = 'tab'+jumpToPanel;
      		viewSection = 'section'+jumpToPanel;
      	
      		showSection(viewTab, viewSection);
      
      		
     	 }
     	 else {
     	 	showSection('tab1', 'section1');
     	 }
     	 
     	 if(jumpToAnchor != '' && jumpToAnchor != null) {
      		
      		var url = window.location.href;
  			
      		window.location = url + '#' + jumpToAnchor;
      		
     	 }
     	 else {
     	 }
     	 
     	subWrapperHeight();
     }

//clear default form field values when clicked
function clickclear(thisfield, defaulttext) {
if (thisfield.value == defaulttext) {
thisfield.value = "";
}
}
function clickrecall(thisfield, defaulttext) {
if (thisfield.value == "") {
thisfield.value = defaulttext;
}
}



function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid email address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid email address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid email address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid email address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid email address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid email address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid email address")
		    return false
		 }

 		 return true					
	}

function submitFormWithVar(destination) {
	
	var subscriberAddress = document.newsSignup.addy.value;
	
	if (echeck(subscriberAddress)==false){
		document.newsSignup.addy.value = "enter your email address";
		return false;
	}
	
	else {
	window.location = destination + "?email=" + subscriberAddress;
	}
}