js验证密码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>密码</title><style type="text/css">body {font-size: 12px;font-family: Arial, Helvetica, sans-serif;margin: 0;}form {margin: 2em;}#chkResult {margin-left: 53px;height: 15px;}</style><script type="text/javascript">//定义检测函数,返回0/1/2/3分别代表无效/差/一般/强 function getResult(s) {var ls = 0;if (s.length < 8) {return ls;}if (s.match(/[a-z]/)){ls++;}if (s.match(/[0-9]/)){ ls++;} if (s.match(/[A-Z]/)){ ls++;}if(ls==3){return 4;}return ls}var msg = new Array(5);msg[0] = "密码必须至少为8个字符长”。";msg[1] = "密码必须包括所有的字符以下类型：小写字母，大写字母和数字";msg[2] = "密码必须包括所有的字符以下类型：小写字母，大写字母和数字";msg[3] = "密码必须包括所有的字符以下类型：小写字母，大写字母和数字";msg[4] = "格式正确。";function setDisplay(mark){var sty = new Array(5);sty[0] = -60;sty[1] = -45;sty[2] = -30;sty[3] = -15;sty[4] = 0;var col = new Array(5);col[0] = "gray";col[1] = "red";col[2] = "#ff6600";col[3] = "#ff6611";col[4] = "Green";//设置显示效果 var bImg = "http://bbs.blueidea.com/attachments/2006/12/7/pwdlen_dSIPeEGQWxfO.gif";//一张显示用的图片 var sWidth = 400;var sHeight = 15;var Bobj = document.getElementById("chkResult");Bobj.style.fontSize = "12px";Bobj.style.color = col[mark];Bobj.style.width = sWidth + "px";Bobj.style.height = sHeight + "px";Bobj.style.lineHeight = sHeight + "px";Bobj.style.background = "url(" + bImg + ") no-repeat left " + sty[mark]+ "px";Bobj.style.textIndent = "20px";Bobj.innerHTML = "检测提示：" + msg[mark];}function checkPas(){var pas=document.getElementById("pwd").value;var mark=getResult( pas);//alert(msg[mark]);}function isSame(){var pas=document.getElementById("pwd").value;var rePas=document.getElementById("pwd2").value;if(pas!=rePas){alert("aa");var Bobj = document.getElementById("errorMsg");Bobj.style.fontSize = "12px";Bobj.style.color = "red";Bobj.innerHTML = "两次输入密码不一致";}//AAAbb2222}</script></head><body><form name="form1"><label for="pwd">用户密码</label><input type="password" name="pwd" onKeyUp="setDisplay(getResult(this.value));" onblur="checkPas();"/><div id="chkResult"></div><br><label for="pwd2">重复密码</label><input type="password" name="pwd2" onblur="isSame();"/><div id="errorMsg"></div></form></body></html>//可以看附件