function loadCheck(){
	var contentid = getQueryVariable("contentid");
	var contentimg = getQueryVariable("contentimg");
	if (contentid != null){
		cs_change_content(contentid,contentimg);
	}else{
		cs_change_content("content_2","/new_images/HDX_product.gif");
	}
}



function getQueryVariable(variable) {
  // Author: Pete Freitag
  // http://www.activsoftware.com/code_samples/code.cfm/CodeID/59/JavaScript/Get_Query_String_variables_in_JavaScript
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
}

function section_highlight(menuid){
	var menuitem = document.getElementById(menuid);
	menuitem.style.backgroundColor = "yellow";
	menuitem.style.color = "black";
	menuitem.style.borderColor = "black";
}

function section_unhighlight(menuid){
	var menuitem = document.getElementById(menuid);
	menuitem.style.backgroundColor = "#485253";
	menuitem.style.color = "white";
	menuitem.style.borderColor = "#485253";

}

function cs_content_highlight(menuid){
	var menuitem = document.getElementById(menuid);
	menuitem.style.backgroundColor = "#6D7486";

}

function cs_content_unhighlight(menuid){
	var menuitem = document.getElementById(menuid);
	menuitem.style.backgroundColor = "#575D6D";
}

function cs_change_content(contentid, contentimg){
	var content_item = document.getElementById(contentid);
	var productimage1 = document.getElementById("productimage_1");
	var productimage2 = document.getElementById("productimage_2");
	var product_overlay_1 = document.getElementById("product_overlay_1");
	var product_overlay_2 = document.getElementById("product_overlay_2");
	var product_feature = document.getElementById("feature_image_1");
		product_feature.src = "/new_images/polycom_feature.jpg";
	
	if (contentid == "content_4"){
		product_overlay_1.style.visibility = "hidden";
		product_overlay_2.style.visibility = "hidden";
		var productimage = productimage2;
		product_feature.src = "/new_images/mobileresponder_feature.jpg";
	}else if (contentid == "content_7"){
		var productimage = productimage1;
		product_overlay_1.style.visibility = "hidden";
		product_overlay_2.style.visibility = "hidden";
		product_feature.src = "/new_images/pvx_feature.jpg";
	}else if (contentid == "content_6"){
		product_overlay_2.style.visibility = "hidden";
		product_overlay_1.style.visibility = "visible";
		var productimage = productimage1;
		product_feature.src = "/new_images/v2iu_feature.jpg";
	}else if (contentid == "content_8"){
		product_overlay_2.style.visibility = "hidden";
		product_overlay_1.style.visibility = "visible";
		product_feature.src = "/new_images/mgc_feature.jpg";
		var productimage = productimage1;
	}else if (contentid == "content_9"){
		product_overlay_2.style.visibility = "hidden";
		product_overlay_1.style.visibility = "visible";
		product_feature.src = "/new_images/mgc_feature.jpg";
		var productimage = productimage1;
	}else if (contentid == "content_10"){
		product_overlay_2.style.visibility = "hidden";
		product_overlay_1.style.visibility = "visible";
		product_feature.src = "/new_images/mgc_feature.jpg";
		var productimage = productimage1;

	}else{
		product_overlay_2.style.visibility = "hidden";
		product_overlay_1.style.visibility = "visible";
		var productimage = productimage1;
	}

	if(contentid == "content_5"){
		product_feature.src = "/new_images/rss2000_feature.jpg";
		
	}
	productimage.src = contentimg;
	
	//hide all
	for (i=1;i<12;i++)
	{	
		content_element = "content_" + i;
		var contentitem = document.getElementById(content_element);
		contentitem.style.visibility = "hidden";
	}

	// show content
	content_item.style.visibility = "visible";
}