function userAgentEnvAlert()
{
	var isOldIE = detectOldIeBrowser();
	
	
}

function detectOldIeBrowser()
{
	var isOldIE = false;
	var msg = '';
	
	var browser=navigator.appName;
	var b_version=navigator.appVersion;
	var version=parseFloat(b_version);
	if ((browser=="Microsoft Internet Explorer") && !(b_version.search("MSIE 7") != -1 || b_version.search("MSIE 8") != -1 ) ) {
	  	isOldIE = true;
		msg = 'Dear visitor, <strong>Your Internet Explorer version is out of date.</strong><br/>This website is designed for version 7 and above. Please upgrade your browser to newest version from <a href="http://www.microsoft.com/windows/Internet-explorer/default.aspx">Official Microsoft Website</a>.<br />After installation, just restart your browser and open the website again. Thank you';
	}
	
	if(isOldIE) {
		document.write('<div class="systemMsg" >' + msg + '</div>');
	}
	
	return isOldIE;
}


function mainPage()
{
	this.bodyOnLoad = function()
	{
		//run header slideshow
		//caseStudySlideShow.runSlideShow();
		
		//setContentScrollHeightByColumn();
	}
}

function setContentScrollHeightByColumn()
{
	var mycustomscroll2 = document.getElementById('mycustomscroll2');
	if(!mycustomscroll2) {
		return false;
	}
	yPos = mycustomscroll2.offsetTop;
	
	var layoutBody = document.getElementById('layoutBody');
	layoutBodyHeight = layoutBody.offsetHeight-70;
	//alert(layoutBodyHeight);
	mycustomscroll2.style.height = layoutBodyHeight+'px';
}

function getObjectPosition(obj) {
	var curleft = 0;
	var curtop = 0;
	  if (obj.offsetParent) {
			do {
				  curleft += obj.offsetLeft;
				  curtop += obj.offsetTop;
			} while (obj = obj.offsetParent);
	  }
	  return [curleft,curtop];
}

function showImgPNG(imgID,backImgURL)
{
	var img = document.getElementById(imgID);
	
	var isIE = navigator.userAgent.indexOf('MSIE');
	
	if(isIE < 0) {
		img.style.backgroundImage = "url('" + backImgURL + "')";
	} else {
		//
	  }
	  
	img.style.backgroundRepeat = 'no-repeat';
	img.style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="' + backImgURL + '", sizingMethod="crop")';
}