function changeLayout(viewType) {
	
		var objView;
		objView = document.getElementById("gridcontainer"); 
		objGrid = document.getElementById("grid");
       	objlist = document.getElementById("list");
		objWindow = document.getElementById("window");	
		objPageView = document.getElementById("pageView");
		
		if(viewType == "gridview")
		{
			objView.className = "gridview";
	        objGrid.className = "gridviewbtn active";
            objlist.className = "listviewbtn";
		    objWindow.className = "windowviewbtn";
            objPageView.value = "gridview";
				
		}
		else if(viewType == "listview")
		{
			objView.className = "listview";
			objlist.className = "listviewbtn active";
            objGrid.className = "gridviewbtn";
			objWindow.className = "windowviewbtn";
            objPageView.value = "listview";
		}
		else {
			objView.className = "windowview";
            objWindow.className = "windowviewbtn active";
			objlist.className = "listviewbtn";
			objGrid.className = "gridviewbtn";
            objPageView.value = "windowview";
		}	
		
	}