var carlen = document.getElementById("carlen");
var mark = new Array("10_1","10_2","10_3","10_4","10_5");
<!-- Begin
var week = new Array("อา", "จ", "อ", "พ", "พฤ", "ศ", "ส"); 
var monthdays = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
var today = new Date();
var month = today.getMonth(); var m = month+1; var keep_m = m+"_";
var day = today.getDay();
var dayN = today.getDate();
var days = monthdays[month];
if (month == 1) {
var year = today.getYear();
if (year%4 == 0) days = 29;
}
document.write("<table border='0' cellspacing='0' cellpadding='0'>");
document.write("<tr>");
for (var i=0; i<7; i++) {
document.write("<td width='30' height='30'>");
document.write("<div align='center'>" + week[i] + "</div>");
document.write("</td>");
}
document.write("</tr>");
var jumped = 0;
var inserted = 1;
var start = day - dayN%7 + 1;
if (start < 0) start += 7;
var weeks = parseInt((start + days)/7);
if ((start + days)%7 != 0) weeks++;
for (var i=weeks; i>0; i--) {
document.write("<tr>");
for (var j=7; j>0; j--) {
document.write("<td height='30'>");
if (jumped<start || inserted>days) {
document.write("<div align='center'></div>");
jumped++;
}
else {
var keep = keep_m+inserted; 
var ins = inserted;

//------------------------------
var ok=false;
if (inserted == dayN) 
	document.write("<div align='center'><font color=lightgreen><b>" + inserted + "</b></font></div>");
else{
		for(var k=0;k<mark.length; k++){
			if(keep==mark[k]) 
				 ok = true; //break;
		}
		
		if(ok==true)
			document.write("<div align='center' ><a href=javascript:calendar_detail() class=mark><b>" + inserted + "</b></a></div>");
		else
			document.write("<div align='center'>" + inserted + "</div>");
	} 
	//
	
inserted++;
}
document.write("</td>")
}
document.write("</tr>");
}
document.write("</table>");
// End -->

//carlen.addListener(carlen, 'click', cli());//--(1)
function calendar_detail(){
var html = "<table width=150 class=txt><tr><td>";
			  html += "ตำแหน่ง(Address) : ";
			  html += "<br />Lat : ";
			  
			  html += "</td></tr></table>"; 
			 // carlen.openInfoWindowHtml=html;
			document.getElementById("calendar_info").innerHTML=html;
			// return aaa;

}