function pre_Load() {
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=pre_Load.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function info(mode,lyrno) {
	if (mode=='open') {
		document.getElementById('info_'+lyrno).style.visibility = "visible";
	}else{
		document.getElementById('info_'+lyrno).style.visibility = "hidden";
	}
}
function balloon(mode,id) {
	if (mode=='open') {
		document.getElementById(id).style.visibility = "visible";
	}else{
		document.getElementById(id).style.visibility = "hidden";
	}
}