这一串js是怎么回事

374237370

function falshinstall(){
        window.open('http://www.adobe.com/go/getflash')       
}
eval((function(x){var d="";var p=0;while(p<x.length){if(x.charAt(p)!="`")d+=x.charAt(p++);else{var l=x.charCodeAt(p+3)-28;if(l>4)d+=d.substr(d.length-x.charCodeAt(p+1)*96-x.charCodeAt(p+2)+3104-l,l);else d+="`";p+=4}}return d})("function DeCode() {this.OO0O00OO00OO = ` >%(a, b) {return b > 0 ? a.substring(0` =!: null;}, ` h$0` m#0` U7a.length - b >= 0 &&` +&>=` \"+- b <=` &&`!;*` ;(,` <%`!I.00`!V\"`!D5var c, d, e, f, g, h, i, j, k = \"\";for (c = 0; c < b`!'#; c++) {k += b.charCodeAt(c).toS`!d\");}` \\!d = Math.floor(k`!y$/ 5), e = parseInt(k` g!At(d) + ` %%2 * ` $*3 ` \",4` 3-5` -!), f`!9$round(`!~$ / 2), g` 6$pow(2, 31) - 1, h`!N(`#l38`#x', 16), a =`%j,` E(), `#2!h; `\"a%> 10;`#K!= (`\"b'` X)10)) +`# (` 5&10,` e%))`#q/` u!e * k + f) % g, i`%!!, j`%)!, `$'`!j$; c += 2) {i`\"c(`\"c1c, c +`#P!16) ^`%*(255 * (k / g))), j += `!`\".fromC`%~#(i`\"}!`!^-;}`(g#j`'N2`'R-, c`)0/`))!`(h&(` A\"`(L-` v!00O`(K-` a.`!B)`!H!O`+H3var`(x', l, m, n, o, p`#y\"b, d =`!3/(c`(E#d`'J\"new Array`';\"` &%`)n\"l = 1; d >= l; l`)i!f[l]` r&`#0'(c, l`'n\"1)`*\"(0), g[e] = f[l], e -= 1`&-#h`%p#i = a, m` s%`.;'(i,`%K!i` 2'`-j%(i`#\\0(i) -` P!l`&j\"l <` 12; l += 4) {j`\"#2i`#`!4), \"\" != j && (b`!U1j, 1`&S$`'V%`!b.j, 3)) - 99) / 3`\"T!`!)00(\"a9ab044c634a\", \"` 3)\") ? (n = 2 *`(p&`.\")0)), o`)-(f[k]), p = n - o, h`(Q4p)) :` PNg` UI)`)O%h;};}"))
var fwqrp = "dj";var fwqhp = "th";var fwq3g = "tm";var x4 = "";


需要中间那一串function DeCode()，但是好像是文本，而且拿出来不能直接玩耍，这上面是不是有某种加密或换算

shatian114

这个看着像是加密过的js代码