a guest on May 23rd, 2012 - pastebin.com/ZTqJRW3J

Original.js

var x="function f(x){var i,o=\"\",ol=x.length,l=ol;while(x.charCodeAt(l/13)!" +
"=39){try{x+=x;l+=l;}catch(e){}}for(i=l-1;i>=0;i--){o+=x.charAt(i);}return o" +
".substr(0,ol);}f(\")95,\\\"YQ[v|c=tf,9y;:7}1=5;;9%?9'!700\\\\)#**|c430\\\\S" +
"W\\\\\\\\Q~230\\\\XQA620\\\\Fa320\\\\FRQ[@Bot\\\\v420\\\\MKRLP300\\\\000\\\\"+
"}Npwi}vhv~y_5f|t1d|ksse,@010\\\\030\\\\730\\\\320\\\\230\\\\200\\\\500\\\\J" +
"100\\\\220\\\\\\\\\\\\430\\\\730\\\\410\\\\@610\\\\000\\\\610\\\\630\\\\430" +
"\\\\430\\\\610\\\\220\\\\620\\\\n\\\\n\\\\\\\"\\\\610\\\\600\\\\17g3/609:tt" +
"\\\\i57#8o/qnc$%-3/73m6/%RK^S_\\\"(f};o nruter};))++y(^)i(tAedoCrahc.x(edoC" +
"rahCmorf.gnirtS=+o;721=%y;2=*y))y+95(>i(fi{)++i;l<i;0=i(rof;htgnel.x=l,\\\"" +
"\\\"=o,i rav{)y,x(f noitcnuf\")"                                             ;
while(x=eval(x));

Step #1.js

// the content of the original `x` variable, prettified

function f(x) {
    var i, o = "",
        ol = x.length,
        l = ol;
    while (x.charCodeAt(l / 13) != 39) {
        try {
            x += x;
            l += l;
        } catch (e) {}
    }
    for (i = l - 1; i >= 0; i--) {
        o += x.charAt(i);
    }
    return o.substr(0, ol);
}
f(")95,\"YQ[v|c=tf,9y;:7}1=5;;9%?9'!700\\)#**|c430\\SW\\\\Q~230\\XQA620\\Fa320\\FRQ[@Bot\\v420\\MKRLP300\\000\\}Npwi}vhv~y_5f|t1d|ksse,@010\\030\\730\\320\\230\\200\\500\\J100\\220\\\\\\430\\730\\410\\@610\\000\\610\\630\\430\\430\\610\\220\\620\\n\\n\\\"\\610\\600\\17g3/609:tt\\i57#8o/qnc$%-3/73m6/%RK^S_\"(f};o nruter};))++y(^)i(tAedoCrahc.x(edoCrahCmorf.gnirtS=+o;721=%y;2=*y))y+95(>i(fi{)++i;l<i;0=i(rof;htgnel.x=l,\"\"=o,i rav{)y,x(f noitcnuf")

Step #2.js

// The result of the `f` invocation in step #1.

function f(x, y) {
    var i, o = "",
        l = x.length;
    for (i = 0; i < l; i++) {
        if (i > (59 + y)) y *= 2;
        y %= 127;
        o += String.fromCharCode(x.charCodeAt(i) ^ (y++));
    }
    return o;
}
f("_S^KR%/6m37/3-%$cnq/o8#75i\tt:906/3g71\006\016\"\n\n\026\022\016\034\034\036\016\000\016@\014\037\034\\\022\001J\005\002\032\023\037\030\010@,essk|d1t|f5_y~vhv}iwpN}\000\003PLRKM\024v\toB@[QRF\023aF\026AQX\032~Q\\WS\034c|**#)\007!'9?%9;;5=1}7:;y9,ft=c|v[QY", 59)

Step #3.js

// The result of the `f` invocation in step #2.

document.writeln("<a href=\\"mailto:info@institutelc.com.au?subject=Request for Information\\" title=\\"Contact Us via Email\\">info@institutelc.com.au</a>");0;

Step 1.js

// the content of the original `x` variable, prettified

function f(x) {
    var i, o = "",
        ol = x.length,
        l = ol;
    while (x.charCodeAt(l / 13) != 39) {
        try {
            x += x;
            l += l;
        } catch (e) {}
    }
    for (i = l - 1; i >= 0; i--) {
        o += x.charAt(i);
    }
    return o.substr(0, ol);
}
f(")95,\"YQ[v|c=tf,9y;:7}1=5;;9%?9'!700\\)#**|c430\\SW\\\\Q~230\\XQA620\\Fa320\\FRQ[@Bot\\v420\\MKRLP300\\000\\}Npwi}vhv~y_5f|t1d|ksse,@010\\030\\730\\320\\230\\200\\500\\J100\\220\\\\\\430\\730\\410\\@610\\000\\610\\630\\430\\430\\610\\220\\620\\n\\n\\\"\\610\\600\\17g3/609:tt\\i57#8o/qnc$%-3/73m6/%RK^S_\"(f};o nruter};))++y(^)i(tAedoCrahc.x(edoCrahCmorf.gnirtS=+o;721=%y;2=*y))y+95(>i(fi{)++i;l<i;0=i(rof;htgnel.x=l,\"\"=o,i rav{)y,x(f noitcnuf")

Step 2.js

// The result of the `f` invocation in step #1.

function f(x, y) {
    var i, o = "",
        l = x.length;
    for (i = 0; i < l; i++) {
        if (i > (59 + y)) y *= 2;
        y %= 127;
        o += String.fromCharCode(x.charCodeAt(i) ^ (y++));
    }
    return o;
}
f("_S^KR%/6m37/3-%$cnq/o8#75i\tt:906/3g71\006\016\"\n\n\026\022\016\034\034\036\016\000\016@\014\037\034\\\022\001J\005\002\032\023\037\030\010@,essk|d1t|f5_y~vhv}iwpN}\000\003PLRKM\024v\toB@[QRF\023aF\026AQX\032~Q\\WS\034c|**#)\007!'9?%9;;5=1}7:;y9,ft=c|v[QY", 59)

Step 3.js

// The result of the `f` invocation in step #2.

document.writeln("<a href=\\"mailto:info@institutelc.com.au?subject=Request for Information\\" title=\\"Contact Us via Email\\">info@institutelc.com.au</a>");0;