var cleaned=new Array();
function contains(a, obj) { var i = a.length; while (i--) { if (a[i] === obj) { return true; } } return false; }
function alter(item) {	for(i=1;i<=4;i++)	{	document.getElementById('l_'+i).className = (item == i) ? 'on' : 'off';	} }
function clean_field(el) { if(contains(cleaned, el.id) == false)	{ cleaned.push(el.id); el.value = ''; el.className = 'activated'; } }
function init_map(id) { }