function getXMLHTTPRequest() {
	var xRequest=null;
	if (window.XMLHttpRequest) {
		//Mozilla/Safari
		xRequest=new XMLHttpRequest();
	} else if (typeof ActiveXObject != "undefined") {
		//Internet Explorer	
		xRequest=new ActiveXObject
		("Microsoft.XMLHTTP");
	}
	return xRequest;
}

function deselectAll() { 
var el;
el = document.getElementById('i1'); 
el.className='';
el = document.getElementById('i2'); 
el.className='';
el = document.getElementById('i3'); 
el.className='';
el = document.getElementById('i4'); 
el.className='';
el = document.getElementById('i5'); 
el.className='';
el = document.getElementById('i6'); 
el.className='';
el = document.getElementById('i7'); 
el.className='';

}

function selectItem(id) {

deselectAll();

var el;
switch (id) {
	case 7: el = document.getElementById('i7'); break;
	case 6: el = document.getElementById('i6'); break;
	case 5: el = document.getElementById('i5'); break;
	case 4: el = document.getElementById('i4'); break;
	case 3: el = document.getElementById('i3'); break;
	case 2: el = document.getElementById('i2'); break;
	case 1: el = document.getElementById('i1'); break;
}
el.className='sel';
}