var aryClassElements = new Array();

      
    function expandCollapse(){    
    var list=document.getElementById('products');
    var p=list.options[list.selectedIndex];
    aryClassElements.length = 0;
    getElementsByClassName( 'show', document.body );
    for ( var i = 0; i < aryClassElements.length; i++ ) {
        aryClassElements[i].className = 'hide';
    }
    document.getElementById(p.value).className = 'show'; 	    
	}
	
	function getElementsByClassName( strClassName, obj ) {
    if ( obj.className == strClassName ) {
        aryClassElements[aryClassElements.length] = obj;
    }
    for ( var i = 0; i < obj.childNodes.length; i++ )
        getElementsByClassName( strClassName, obj.childNodes[i] );
}

  function redirect(url) {
    window.location=url;
  }