String.prototype.zero = function(){
		if(this.length == 1)
			return "0" + this;
		else
			return this;
	}
	String.prototype.yyyymmdd = function(){
		var str = this.trim();
		if(str=="")
			return "";
		else
			return str.substring(0, 4) + "-" + str.substring(4, 6) + "-" + str.substring(6, 8);
	}
	String.prototype.hh24 = function(){
		var str = this;
		return str.substring(8, 10).zero();
	}
	String.prototype.mi = function(){
		var str = this;
		return str.substring(10, 12).zero();
	}
	String.prototype.trim = function() {return this.replace(/(^\s*)|(\s*$)/g, "");}
	String.prototype.num = function() {return this.replace(/[^0-9]/g, "");}
	String.prototype.money = function() {	// ¼ýÀÚ3°³´ç , Çϳª¾¿ Âï¾îÁØ´Ù.
		var num = this.trim();
		while((/(-?[0-9]+)([0-9]{3})/).test(num)) {
			num = num.replace((/(-?[0-9]+)([0-9]{3})/), "$1,$2");
		}
		return num;
	}
	String.prototype.byte = function() {
		var cnt = 0;
		for (var i = 0; i < this.length; i++) {
			if (this.charCodeAt(i) > 127)
				cnt += 2;
			else
				cnt++;
		}
		return cnt;
	}
	String.prototype.int = function() {
		if(!isNaN(this))
			return parseInt(this);		
		else
			return null;		
	}
	function isInt(str) {
		var num = str.num();

		if (num.length == str.length) {
			return true; // ¼ýÀڷθ¸ ÀÌ·ç¾îÁ® ÀÖÀ½
		} else {
			return false; // ¼ýÀڷθ¸ ÀÌ·ç¾îÁ® ÀÖÁö ¾ÊÀ½
		}
	}

	String.prototype.cvtGubun = function(){var sdt = this;return sdt.substr(2, 2) + "³â " + sdt.substr(4, 2) + "¿ù";}
	String.prototype.cvtDtKr = function(type){
		var dt = this;
		if(type == "yymmddhhmi")
			return dt.substr(2, 2) + "³â " + dt.substr(4, 2) + "¿ù " + dt.substr(6, 2) + "ÀÏ " + dt.substr(8, 2) + "½Ã " + dt.substr(10, 2) + "ºÐ";
		else if(type == "yymmddhhmi2")
			return dt.substr(2, 2) + "/" + dt.substr(4, 2) + "/" + dt.substr(6, 2) + " " + dt.substr(8, 2) + ":" + dt.substr(10, 2);
		else if(type == "yyyymmddhhmi2")
			return dt.substr(0, 4) + "/" + dt.substr(4, 2) + "/" + dt.substr(6, 2) + " " + dt.substr(8, 2) + ":" + dt.substr(10, 2);
		else if(type == "mmddhhmi")
			return dt.substr(4, 2) + "¿ù " + dt.substr(6, 2) + "ÀÏ " + dt.substr(8, 2) + "½Ã " + dt.substr(10, 2) + "ºÐ";
		else if(type == "ddhhmi")
			return dt.substr(6, 2) + "ÀÏ " + dt.substr(8, 2) + "½Ã " + dt.substr(10, 2) + "ºÐ";
		else if(type == "mmddhhmiss2")
			return dt.substr(4, 2) + "/" + dt.substr(6, 2) + " " + dt.substr(8, 2) + ":" + dt.substr(10, 2) + ":" + dt.substr(12, 2);
		else 	if(type == "yymmddhhmiss3")
			return dt.substr(2, 2) + "-" + dt.substr(4, 2) + "-" + dt.substr(6, 2) + " " + dt.substr(8, 2) + ":" + dt.substr(10, 2) + ":" + dt.substr(12, 2);
		else 	if(type == "yymmdd3")
			return dt.substr(2, 2) + "-" + dt.substr(4, 2) + "-" + dt.substr(6, 2);
		else 	if(type == "yymmdd2")
			return dt.substr(2, 2) + "/" + dt.substr(4, 2) + "/" + dt.substr(6, 2);
		else 	if(type == "yymmdd")
			return dt.substr(2, 2) + "³â " + dt.substr(4, 2) + "¿ù " + dt.substr(6, 2) + "ÀÏ";
		else
			return dt	
	}

	String.prototype.yymm = function(){
		var str = this;

		if(str.length == 6)
			return str.substring(2, 4)+ "/" + str.substring(4, 6)
		else
			return "";
	}
	
	String.prototype.cvtInt2Date = function(){	// Ãʸ¦ ÀϽúÐÃÊ·Î º¯È¯
		var num = this;
		if(num < 1){return "¸¶°¨µÇ¾ú½À´Ï´Ù.";}
		var tmp = 0;
		var sec1 = 1;
		var mi1 = sec1 * 60;
		var hh1 = mi1 * 60;
		var day1 = hh1 * 24;
		var rtn = "";
		var day = parseInt(num / day1);
		tmp = num - (day * day1)
		var hh = parseInt(tmp / hh1);		
		tmp -= hh * hh1
		var mi = parseInt(tmp / mi1);
		tmp -= mi * mi1	 // ÃÊ
		
		if(day > 0){
			return day + "ÀÏ " + hh + "½Ã " + mi + "ºÐ " + tmp + "ÃÊ";
		}else if(hh > 0){
			return hh + "½Ã " + mi + "ºÐ " + tmp + "ÃÊ";
		}else if(mi > 0){
			return mi + "ºÐ " + tmp + "ÃÊ";		
		}else{
			return tmp + "ÃÊ";				
		}
	}
	String.prototype.right1 = function(){
		var str = this;
		return str.substr(str.length-1, 1);
	}
	String.prototype.equalsChg = function(a, b, c){
		if(this == a){
			return b;
		}else{
			return c;
		}
	}
	function getObj(id){return document.getElementById(id);}