This article mainly introduces jQuery to implement the password strength prompt information function when registering a member, involving jQuery event response and string traversal, operation and judgment and other related operating techniques. Friends in need can refer to it. I hope it can help everyone.
The example in this article describes how jQuery implements the password strength prompt information function when registering as a member. Share it with everyone for your reference, the details are as follows:
1. The effect is as shown in the picture:
##2.html code:<p><span>设置密码:</span><input type="password" id="external_regist_password1" name="password1" value="" /><b>*</b> <span id="password1_bg" class="bg_rt" style="display:none"></span> </p> <p class="mima_qd" id="password1_strength" style="display:none"> <span class="mm_strength"><em>密码强度</em> <i class="password_qd"> <span class="password_bg" id="strength_L"></span> <span class="password_bg" id="strength_M"></span> <span class="password_bg" id="strength_H"></span> </i> <em id="pw_check_info"></em> </span> </p> <p class="tishi_wr" id="password1_info"></p>
//checkStrong函数 //返回密码的强度级别 function checkStrong(sPW){ if (sPW.length<=4) return 0; //密码太短 var Modes=0; for (i=0;i<sPW.length;i++){ //测试每一个字符的类别并统计一共有多少种模式. //charCodeAt():返回unicode编码的值 Modes|=CharMode(sPW.charCodeAt(i)); //测试某个字符属于哪一类 } return bitTotal(Modes);//计算出当前密码当中一共有多少种模式 } //CharMode函数 //测试某个字符是属于哪一类. function CharMode(iN){ if (iN>=48 && iN <=57) //数字 return 1; if (iN>=65 && iN <=90) //大写字母 return 2; if (iN>=97 && iN <=122) //小写 return 4; else return 8; //特殊字符 } //bitTotal函数 //计算出当前密码当中一共有多少种模式 function bitTotal(num){ var modes=0; for (i=0;i<4;i++){ if (num & 1) modes++; num>>>=1; } return modes; } //pwStrength函数 //当用户放开键盘或密码输入框失去焦点时,根据不同的级别显示不同的颜色 function pwStrength(pwd){ var O_color="#eeeeee"; var L_color="#FF4040"; var M_color="#FF9900"; var H_color="#33CC00"; var info = ""; if (pwd==null||pwd==''){ Lcolor=Mcolor=Hcolor=O_color; } else { S_level=checkStrong(pwd);//检测密码的强度 switch(S_level) { case 0: Lcolor=L_color; Mcolor=Hcolor=O_color; info = "弱"; break; case 1: Lcolor=L_color; Mcolor=Hcolor=O_color; info = "弱"; break; case 2: Lcolor=Mcolor=M_color; Hcolor=O_color; info = "中"; break; default: Lcolor=Mcolor=Hcolor=H_color; info = "强"; } } $("#strength_L").css("background", Lcolor); $("#strength_M").css("background", Mcolor); $("#strength_H").css("background", Hcolor); $("#pw_check_info").html(info);//密码强度提示信息 return; }
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