function nav(sel) {

	var objYear = document.getElementById("my_year");

	var valYear = objYear.options[objYear.selectedIndex].value;

	var wkParamYear = valYear;

	var url = "";

		var objMonth = document.getElementById("my_month");
		var valMonth = objMonth.options[objMonth.selectedIndex].value;
		var wkParamMonth = valMonth;

		if ( valMonth.length < 2 && valMonth!="" ) { valMonth = "0"+valMonth; }

		var url=valYear;
		if ( wkParamMonth!=""){ 
		    url+=valMonth+".html?y="+wkParamYear+"&m="+wkParamMonth;
		} else {
		    url+="index.html?y="+wkParamYear;
		}

	location.href = url;
}

var _GET = new Array();
  
function reqGET() {

	 var subSTR = window.location.search.substring(1);
	 var arP = subSTR.split('&');

	 for (var i=0; i<arP.length; i++) {

		 var wk = arP[i].indexOf('=');

		 if (wk > 0) {
			 var key = arP[i].substring(0, wk);
			 var val = arP[i].substring(wk + 1);

			 _GET[key] = val;
		 }
	}

	var obj	= document.getElementById("my_year");
	if ( _GET["y"] == undefined ) {
		obj.options[0].selected = true;

		chgYear(null);

	} else {
		for ( i=0; i<obj.options.length; i++ ) {
			if ( _GET["y"] == obj.options[i].value ) {
				obj.options[i].selected = true;
			}
		}

		chgYear(_GET["y"]);

	}

	obj	= document.getElementById("my_month");
	for ( i=0; i<obj.options.length; i++ ) {
		if ( _GET["m"] == obj.options[i].value ) {

			obj.options[i].selected = true;
		}
	}
}

function chgYear(get_year) {

	var objDate = new Date();
	
	var fullYear = objDate.getFullYear();
	var Month = objDate.getMonth()+1;

	var objYear = document.getElementById("my_year");

	var year = null;
	if ( get_year == null ){
		year = objYear.options[objYear.selectedIndex].value;
	} else {
		year = get_year;
	}

	var sel = document.getElementById("my_month");
	for ( var i=sel.childNodes.length-1; i>=0; i--){ 
		sel.removeChild(sel.childNodes[i]);
	}
	
	var month_area = document.getElementById("month_area");
	
		month_area.style.display = "inline";	
		for ( var k=0; k<=12; k++){
			
			var throw_flag = false;
			for ( var m=0; m<m_throw.length; m++ ) {
				var ar = m_throw[m].split("/");

				if ( "/press-e/"+ar[0]+"/" == year && ar[1] == k ) {
					throw_flag = true;
					break;
				}
			}
			
			if ( throw_flag ) { continue; }

			if ( year == "/press-e/"+fullYear+"/" && k > parseInt(Month)) {
				break;
			}
			
			var opt = document.createElement("option");
	
			var str="";
			if ( k==0 ) {
				opt.setAttribute("value","");
				str = "All";
			} else {
				opt.setAttribute("value",k);
				str = k;
			}
			opt.innerHTML = str;
			
			sel.appendChild(opt);
		}

}

reqGET();