Js pulled from Netease calls the ad display file (random probability) _ ad code

The js Code obtained from Netease calls the ad display file (random probability). The probability of display depends mainly on the random number. For more information, see. Call the advertisement display file from js pulled by Netease
Only a few lines of code below can randomly display flash and gif ads, not bad

The Code is as follows:

Function column02 (imgSource, url, chance, type ){
This. imgSource = imgSource;
This. url = url;
This. chance = chance;
This. type = type;
}
Function dispColumn02 (){
With (this)
Switch (type ){
Case "img ":
Document. write ("");
Break;
Case "html ":
Document. write ("");
Break;
Case "flash ":
Document. write ("");
Break;
Default:
Document. write ("");
}
}
Column02.prototype. dispColumn02 = dispColumn02;
Columns02 = new Array ();
// Flash, html, and img represent three different ad Modes
// The number of 200 is the probability of occurrence.
Columns02 [0] = new column02 ("http://smsimg.163.com/honey/honey_ad.swf", "", 200, "flash"); // ad
Columns02 [1] = new column02 ("http://smsimg.163.com/honey/honey_photo.swf", "", 800, "flash"); // upload images for rent-free monthly
Columns02 [2] = new column02 ("http://smsimg.163.com/honey/honey_gold.swf", "", 800, "flash"); // login to send gold coins
// Columns02 [] = new column02 ("f", "", 100, ""); // (20030422 ~ 20030722)
Sum_of_all_chances = 0;
For (I = 0; I <columns02.length; I ++ ){
Sum_of_all_chances + = columns02 [I]. chance;
}
Function randomColumn02 (){
Chance_limit = 0;
Randomly_selected_chance = Math. round (sum_of_all_chances-1) * Math. random () + 1;
For (I = 0; I <columns02.length; I ++ ){
Chance_limit + = columns02 [I]. chance;
If (randomly_selected_chance <= chance_limit ){
Columns02 [I]. dispColumn02 ();
Break;
}
}
}
This_column02 = randomColumn02 ();

The larger the chance, the higher the chance of displaying the code.

Script function jb51 (url, chance) {this. url = url; this. chance = chance;} var da, dalen, chance_limit, random_sel_num da = new Array (); da [0] = new jb51 ("http://www.baidu.com", 200) da [1] = new jb51 ("http://www.jb51.net", 600) da [2] = new jb51 ("http:// SC .jb51.net", 800) var dalen = da. length; num_all_chance = 0; for (I = 0; I <dalen; I ++) {num_all_chance + = da [I]. chance;} function random_da () {chance_limit = 0; random_sel_num = Math. round (num_all_chance-1) * Math. random () + 1; for (I = 0; I <dalen; I ++) {chance_limit + = da [I]. chance; if (random_sel_num <= chance_limit) {alert (random_sel_num + "display number" + (I + 1) + "ad"); break ;}}} this_da = random_da (); script
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