var googlepagerank = {
	hexdec: function(hex_string) {
	    hex_string = (hex_string+'').replace(/[^a-f0-9]/gi, '');
	    return parseInt(hex_string, 16);
	},
	count: function( mixed_var, mode ) {
	    var key, cnt = 0;
	    if( mode == 'COUNT_RECURSIVE' ) mode = 1;
	    if( mode != 1 ) mode = 0;
	    for (key in mixed_var){
	        cnt++;
	        if( mode==1 && mixed_var[key] && (mixed_var[key].constructor === Array || mixed_var[key].constructor === Object) ){
	            cnt += count(mixed_var[key], 1);
	        }
	    }
	    return cnt;
	},
	sizeof: function( mixed_var, mode ) {
	    return googlepagerank.count( mixed_var, mode );
	},
	ord: function(string) {
	    return (string+'').charCodeAt(0);
	},
	strlen: function(string) {
	    var str = string+'';
	    var i = 0, chr = '', lgth = 0;
	    var getWholeChar = function (str, i) {
	        var code = str.charCodeAt(i);
	        var next = '', prev = '';
	        if (0xD800 <= code && code <= 0xDBFF) {
	            if (str.length <= (i+1))  {
	                throw 'High surrogate without following low surrogate';
	            }
	            next = str.charCodeAt(i+1);
	            if (0xDC00 > next || next > 0xDFFF) {
	                throw 'High surrogate without following low surrogate';
	            }
	            return str[i]+str[i+1];
	        } else if (0xDC00 <= code && code <= 0xDFFF) {
	            if (i === 0) {
	                throw 'Low surrogate without preceding high surrogate';
	            }
	            prev = str.charCodeAt(i-1);
	            if (0xD800 > prev || prev > 0xDBFF) {
	                throw 'Low surrogate without preceding high surrogate';
	            }
	            return false;
	        }
	        return str[i];
	    };
	    for (i=0, lgth=0; i < str.length; i++) {
	        if ((chr = getWholeChar(str, i)) === false) {
	            continue;
	        }
	        lgth++;
	    }
	    return lgth;
	},
	substr: function(f_string,f_start,f_length ) {
			f_string += '';
			if(f_start < 0) {
					f_start += f_string.length;
			}
			if(f_length == undefined) {
					f_length = f_string.length;
			} else if(f_length < 0){
					f_length += f_string.length;
			} else {
					f_length += f_start;
			}
			if(f_length < f_start) {
					f_length = f_start;
			}
			return f_string.substring(f_start, f_length);
	},
	zeroFill: function(a, b){
		z = googlepagerank.hexdec(80000000);
		if (z & a) {
			a = (a >> 1);
			a &= (~ z);
			a |= 0x40000000;
			a = (a >> (b - 1));
		}
		else {
			a = (a >> b);
		}
		return a;
	},
	mix: function(a, b, c){
		a -= b; a -= c; a ^= (this.zeroFill(c, 13));
		b -= c; b -= a; b ^= (a << 8);
		c -= a; c -= b; c ^= (this.zeroFill(b, 13));
		a -= b; a -= c; a ^= (this.zeroFill(c, 12));
		b -= c; b -= a; b ^= (a << 16);
		c -= a; c -= b; c ^= (this.zeroFill(b, 5));
		a -= b; a -= c; a ^= (this.zeroFill(c, 3));
		b -= c; b -= a; b ^= (a << 10);
		c -= a; c -= b; c ^= (this.zeroFill(b, 15));
		return new Array(a, b, c);
	},
	ch: function(url){
		length = googlepagerank.sizeof(url);
		a = 0x9E3779B9;
		b = 0x9E3779B9;
		c = 0xE6359A60;
		k = 0;
		len = length;
		while (len >= 12) {
			a += (url[k + 0] + (url[k + 1] << 8) + (url[k + 2] << 16) + (url[k + 3] << 24));
			b += (url[k + 4] + (url[k + 5] << 8) + (url[k + 6] << 16) + (url[k + 7] << 24));
			c += (url[k + 8] + (url[k + 9] << 8) + (url[k + 10] << 16) + (url[k + 11] << 24));
			m = this.mix(a, b, c);
			a = m[0]; b = m[1]; c = m[2];
			k += 12;
			len -= 12;
		}
		c += length;
		switch (len) {
			case 11: c += (url[k + 10] << 24);
			case 10: c += (url[k + 9] << 16);
			case 9:  c += (url[k + 8] << 8);
			case 8:  b += (url[k + 7] << 24);
			case 7:  b += (url[k + 6] << 16);
			case 6:  b += (url[k + 5] << 8);
			case 5:  b += (url[k + 4]);
			case 4:  a += (url[k + 3] << 24);
			case 3:  a += (url[k + 2] << 16);
			case 2:  a += (url[k + 1] << 8);
			case 1:  a += (url[k + 0]);
		}
		m = this.mix(a, b, c);
		return m[2];
	},
	strord: function(string){
		var result = new Array();
		for (i = 0; i < googlepagerank.strlen(string); i++) {
			result[i] = googlepagerank.ord(string[i]);
		}
		return result;
	},
	gethash: function(url) {
		return this.ch(this.strord("info:" + url));
	},
	getpr: function(baseurl) {
		var query = "";
		query += "http://www.google.com/search";
		query += "?client=navclient-auto";
		query += "&hl=en";
		query += "&ch=6"+googlepagerank.gethash(baseurl);
		query += "&ie=UTF-8";
		query += "&oe=UTF-8";
		query += "&features=Rank";
		query += "&q=info:"+baseurl;

		var req = new XMLHttpRequest();
		req.onreadystatechange = function(){
			if (req.readyState == 4) {
				var str = req.responseText;
				var pagerank = googlepagerank.substr(str, 9, 2);
				alert(req.responseText);
			}
		}
		req.open('GET', query, true);
		req.send(null);
	}
}