var articles=new Ext.tree.ColumnTree({        
							width:552,
							autoHeight:false,
							rootVisible:false,
							autoScroll:true,
							iconCls:'pro',
							listeners: {click : addTabToCenter},
							title: 'Articles/Tutorials',
							
							columns:[{
								header:'Name',
								width:150,
								dataIndex:'Name'
							},{
								header:'Technology',
								width:100,
								dataIndex:'tech'
							},{
								header:'Language',
								width:100,
								dataIndex:'language'
							},{
								header:'Date of creation',
								width:100,
								dataIndex:'date'
							}],
					
							loader: new Ext.tree.TreeLoader({
								dataUrl:'homePage/westPanel/articles.json',
								requestMethod : "GET",
								uiProviders:{
									'col': Ext.tree.ColumnNodeUI
								}
							}),
					
							root: new Ext.tree.AsyncTreeNode({
								text:'Projects',
								url: 'url',								
								title : 'title'
							})
						});