JavaScript - Works In Ie But Doesnt Work In Firefox

function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=1,menubar=0,resizable=0,width=600,height=400,left = 540,top = 325');");
}

<a href="javascript:popUp('/email/agent/aid/<?php echo $this->agent->pers_code?>')"  >

$('nav li a').click(function() {
	$(this).parent().addClass('on').siblings().removeClass('on');
});

<nav>
   <li class="highlt">
     <a href="index.php" class="home"><span>Home</span></a>
</li>

function game() {
	document.getElementById('title').innerHTML =  '<p style="float: left; text-decoration: underline; font-weight: bold;">Deady Teddy</p><img  src=css/images/popup/close.png style="float: right; cursor: hand;" href="javascript: hideModal("modalPage");"></img>';
}

<a href="javascript:void(0);" onClick="javascript: revealModal('modalPage'); game();">Deady Teddy </a>

<div id="modalPage">
	<div class="modalBackground"></div>
		<div class="modalContainer">
			<div class="modal">
				<div class="modalTop" id="title" onselectstart='return false'>
</div></div></div></div>

function download(href) 
{
document.location.href = href;
}

----------------------------
function checkfile_newsletter() {

    document.getElementById('spn_msg').innerHTML = '';
    if(window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();

    } else {// code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange = function() {

      if(xmlhttp.readyState==4 && xmlhttp.status==200) {
          str = xmlhttp.responseText;

          if(str == "active") {
              try {

                  //document.getElementById('anchor_nl2').click();
                  obj = document.getElementById('anchor_nl2');

                  if (obj.click) {
                      obj.click();


                  } else if(document.createEvent) {
                      var evt = document.createEvent("MouseEvents");
                      evt.initMouseEvent("click", true, true, window,
                          0, 0, 0, 0, 0, false, false, false, false, 0, null);
                      var allowDefault = anchorObj.dispatchEvent(evt);

                  }
              } catch(e) {}
              return false;

          }
          document.getElementById('spn_msg').innerHTML = str;
      }
    }
    var url = document.getElementById('hdn_contextpath').value + "index.php/download/checknewsletter/" + document.getElementById('sel_year').options[document.getElementById('sel_year').selectedIndex].value + "/" + document.getElementById('sel_month').options[document.getElementById('sel_month').selectedIndex].value + "/none/" + new Date().getTime() + '/'+ Math.random();;
    xmlhttp.open("GET",url,true);
    xmlhttp.send(url);
alert(url);
}

<?php if (is_front_page()) { 
	include ("homepage-slider.php");
} ?>

<!--  Inner content DIVs should always carry "contentdiv" CSS class  -->
<!--  Pagination DIV should always carry "paginate-SLIDERID" CSS class  -->
<div id="slider1" class="sliderwrapper">
 <div class="contentdiv">
  <div class="home-div1">
   <div class="home-div-logo"></div>
  </div>
 </div>
 <div class="contentdiv">
  <div class="home-div2">
   <span></span>
  </div>
 </div>
 <div class="contentdiv">
  <div class="home-div3">
   <span></span>
  </div>
 </div>
</div>
<div id="paginate-slider1" class="pagination" style="display:none;">
</div>

<script type="text/javascript">
featuredcontentslider.init({
	id: "slider1",  //id of main slider DIV
	contentsource: ["inline", ""],  //Valid values: ["inline", ""] or ["ajax", "path_to_file"]
	toc: "#increment",  //Valid values: "#increment", "markup", ["label1", "label2", etc]
	nextprev: ["Previous", "Next"],  //labels for "prev" and "next" links. Set to "" to hide.
	revealtype: "click", //Behavior of pagination links to reveal the slides: "click" or "mouseover"
	enablefade: [true, 0.2],  //[true/false, fadedegree]
	autorotate: [true, 4000],  //[true/false, pausetime]
	onChange: function(previndex, curindex){  //event handler fired whenever script changes slide
		//previndex holds index of last slide viewed b4 current (1=1st slide, 2nd=2nd etc)
		//curindex holds index of currently shown slide (1=1st slide, 2nd=2nd etc)
	}
})
</script>

function readData() {
      var request = GXmlHttp.create();
      request.open("GET", "phpsqlinfo_result.php", true);
      request.onreadystatechange = function() {
        if (request.readyState == 4) {
          var xmlDoc = GXml.parse(request.responseText);
          // obtain the array of markers and loop through it
		  	  i=[0];
			  markers=[0];
			  map.getInfoWindow().hide();
			  gmarkers = [];
			  map.clearOverlays();
			  side_bar_html = "";
			  
          var markers = xmlDoc.documentElement.getElementsByTagName("marker");
          
          for (var i = 0; i < markers.length; i++) {
            // obtain the attribues of each marker
            var lat = parseFloat(markers[i].getAttribute("lat"));
            var lng = parseFloat(markers[i].getAttribute("lng"));
            var point = new GLatLng(lat,lng);
            
            var label = markers[i].getAttribute("name");
			var address = markers[i].getAttribute("address");
			var type = markers[i].getAttribute("type");
			
			
			var html = '<' + 'script src="http://twitter.com/javascripts/blogger.js"><' + '/script><' + 'script type="text/javascript" src="http://twitter.com/statuses/user_timeline/' + label + '.json?callback=twitterCallback2&count=1"><' + '/script><br /><div id="twitter_update_list" style="list-style:none"></div>';
            
            // create the marker
            var marker = createMarker(point,label,html);
            map.addOverlay(marker);
          }
          // put the assembled side_bar_html contents into the side_bar div
          document.getElementById("side_bar").innerHTML = side_bar_html;
        }
      }
      request.send(null);
    }

function hrsavailable() {

	var divs = document.getElementsByTagName("div");
	var srdjanhrs = -0.5;
	
	for (var i=0;i<divs.length;i++){ 
		if (colorToHex(divs[i].style.backgroundColor) == "#ffbb6e") {;
			srdjanhrs = srdjanhrs + 0.5;
		}
	}
	
	document.getElementById("srdjanhrs").firstChild.data = srdjanhrs;
}

function colorToHex(color) {

    if (color.substr(0, 1) === '#') {
        return color;
    }
	
    var digits = /(.*?)rgb\((\d+), (\d+), (\d+)\)/.exec(color);
    var red = parseInt(digits[2]);
    var green = parseInt(digits[3]);
    var blue = parseInt(digits[4]);
    var rgb = blue | (green << 8) | (red << 16);
    return digits[1] + '#' + rgb.toString(16);
	
}

function refresh_timer(){
//alert(window.timer);
	var total = getTotal();
	document.getElementById('status').innerHTML = 'Updating in '+ (total-(window.timer+1))+' seconds.';
	if((total-window.timer) == 0){
		refresh_feed();
	}
	else{
		//setTimeout("refresh_timer()",1000);
		setTimeout(function(){ alert("");},1000);
		window.timer++;
//alert("1");
//alert(window.timer);
	}
}