密码强度验证js代码
<html><head><title>JS判断密码强度</title><script language=javascript>//判断输入密码的类型function CharMode(iN){if (iN>=48 && iN <=57) //数字return 1;if (iN>=65 && iN <=90) //大写return 2;if (iN>=97 && iN <=122) //小写return 4;elsereturn 8; }//bitTotal函数//计算密码模式function bitTotal(num){modes=0;for (i=0;i<4;i++){if (num & 1) modes++;num>>>=1;}return modes;}//返回强度级别function checkStrong(sPW){if (sPW.length<=4)return 0; //密码太短Modes=0;for (i=0;i<sPW.length;i++){//密码模式Modes|=CharMode(sPW.charCodeAt(i));}return bitTotal(Modes);} //显示颜色function pwStrength(pwd){O_color="#eeeeee";L_color="#FF0000";M_color="#FF9900";H_color="#33CC00";if (pwd==null||pwd==''){Lcolor=Mcolor=Hcolor=O_color;}else{S_level=checkStrong(pwd);switch(S_level) {case 0:Lcolor=Mcolor=Hcolor=O_color;case 1:Lcolor=L_color;Mcolor=Hcolor=O_color;break;case 2:Lcolor=Mcolor=M_color;Hcolor=O_color;break;default:Lcolor=Mcolor=Hcolor=H_color;}}document.getElementById("strength_L").style.background=Lcolor;document.getElementById("strength_M").style.background=Mcolor;document.getElementById("strength_H").style.background=Hcolor;return;}</script></head><body><form name=form1 action="" >密码:<input type=password size=8 onKeyUp=pwStrength(this.value) onBlur=pwStrength(this.value)><br>密码强度:<table width="210" border="1" cellspacing="0" cellpadding="1" bordercolor="#eeeeee" height="22" style='display:inline'><tr align="center" bgcolor="#f5f5f5"><td width="33%" id="strength_L">弱</td><td width="33%" id="strength_M">中</td><td width="33%" id="strength_H">强</td></tr></table></form></body></html>
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