function trimStr(str)
{
    if( str == undefined || str == null ) return '';
    
    return str.replace(/(^\s*)|(\s*$)/g,'');
}

function isEmptyStr(obj)
{
    return ''==trimStr(obj);
}


//ÓÒ²àÇл»
function swap_tab(n){
	for(var i=1;i<=3;i++){
		var curC=document.getElementById("tab_"+i);
		var curB=document.getElementById("tab_t"+i);
		if(n==i){
			curC.style.display="block";
			curB.className="active"
		}else{
			curC.style.display="none";
			curB.className="normal"
		}
	}
} 
//ÓÒ²àÇл»2
function swap_tab2(n){
	for(var i=1;i<=2;i++){
		var curC=document.getElementById("tab2_"+i);
		var curB=document.getElementById("tab2_t"+i);
		if(n==i){
			curC.style.display="block";
			curB.className="active"
		}else{
			curC.style.display="none";
			curB.className="normal"
		}
	}
}


var keyStr = "ABCDEFGHIJKLMNOP" + "QRSTUVWXYZabcdef" + "ghijklmnopqrstuv" + "wxyz0123456789+/" + "=";
function encode64(input) {
    input = escape(input);
    var output = "";
    var chr1, chr2, chr3 = "";
    var enc1, enc2, enc3, enc4 = "";
    var i = 0;
    do {
        chr1 = input.charCodeAt(i++);
        chr2 = input.charCodeAt(i++);
        chr3 = input.charCodeAt(i++);

        enc1 = chr1 >> 2;
        enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
        enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
        enc4 = chr3 & 63;

        if (isNaN(chr2)) {
            enc3 = enc4 = 64;
        }
        else if (isNaN(chr3)) {
            enc4 = 64;
        }

        output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) + keyStr.charAt(enc3) +
            keyStr.charAt(enc4);
        chr1 = chr2 = chr3 = "";
        enc1 = enc2 = enc3 = enc4 = "";
    } while (i < input.length);
    return output;
}

function decode64(input) {
    var output = "";
    var chr1, chr2, chr3 = "";
    var enc1, enc2, enc3, enc4 = "";
    var i = 0;

    var base64test = /[^A-Za-z0-9\+\/\=]/g;
    if (base64test.exec(input)) {
        alert("There were invalid base64 characters in the input text.\n" +
            "Valid base64 characters are A-Z, a-z, 0-9, '+', '/', and '='\n" +
            "Expect errors in decoding.");
    }
    input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

    do {
        enc1 = keyStr.indexOf(input.charAt(i++));
        enc2 = keyStr.indexOf(input.charAt(i++));
        enc3 = keyStr.indexOf(input.charAt(i++));
        enc4 = keyStr.indexOf(input.charAt(i++));

        chr1 = (enc1 << 2) | (enc2 >> 4);
        chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
        chr3 = ((enc3 & 3) << 6) | enc4;

        output = output + String.fromCharCode(chr1);

        if (enc3 != 64) {
            output = output + String.fromCharCode(chr2);
        }
        if (enc4 != 64) {
            output = output + String.fromCharCode(chr3);
        }

        chr1 = chr2 = chr3 = "";
        enc1 = enc2 = enc3 = enc4 = "";

    } while (i < input.length);
    return unescape(output);
}