function ContentHeight(){
	var contentDiv;
	if(document.getElementById("mainContent") == null){
		//about us page
		contentDiv = document.getElementById("mainContentAbout");
		var rightSideBar = document.getElementById("rightSideBar");
		var cHeight = contentDiv.offsetHeight;
		var rHeight = rightSideBar.offsetHeight;
		if(rHeight > cHeight){
			contentDiv.style.height = rHeight + "px";
		}
		if(cHeight < 700){
			contentDiv.style.height = "700px";
		}
	}else{
		//other pages
		
		contentDiv = document.getElementById("mainContent");
		var leftSideBar = document.getElementById("leftSideBar");
		var rightSideBar = document.getElementById("rightSideBar");
		
		contentDiv.style.height = "auto";
		rightSideBar.style.height = "auto";
		leftSideBar.style.height = "auto";
		
		var cHeight = contentDiv.offsetHeight;
		var lHeight = leftSideBar.offsetHeight;
		var rHeight = rightSideBar.offsetHeight;
		var gHeight = lHeight;
		if(cHeight > gHeight)
			gHeight = cHeight;
		if(rHeight > gHeight)
			gHeight = rHeight;
			
		if(gHeight < 700)
			gHeight = 700;
		
		
			contentDiv.style.height = gHeight + -0 + "px";
			rightSideBar.style.height = gHeight + 0 + "px";
		try{
			leftSideBar.style.height = gHeight + 0 + "px";
		}catch(err){
			alert(err);
		}
	}
}