常用到的javaScript代码

常用到的javaScript代码

判断字符全部由a-Z或者是A-Z的字字母组成：

<input onblur="if(/[^a-zA-Z]/g.test(this.value))alert('有错')">

判断字符由字母和数字组成：

<input onblur="if(/[^0-9a-zA-Z]/g.test(this.value))alert('有错')">

判断字符由字母和数字，下划线,点号组成.且开头的只能是下划线和字母：

/^([a-zA-z_]{1})([\w]*)$/g.test(str)

判断浏览器的类型：

 window.navigator.appName

判断ie的版本：

window.navigator.appVersion

判断客户端的分辨率：

window.screen.height;  window.screen.width;

复选框的全选，多选，全不选，反选：

<form name=hrong>
<input type=checkbox name=All onclick="checkAll('mm')">全选<br/>
<input type=checkbox name=mm onclick="checkItem('All')"><br/>
<input type=checkbox name=mm onclick="checkItem('All')"><br/>
<input type=checkbox name=mm onclick="checkItem('All')"><br/>
<input type=checkbox name=mm onclick="checkItem('All')"><br/>
<input type=checkbox name=mm onclick="checkItem('All')"><br/><br/>


<input type=checkbox name=All2 onclick="checkAll('mm2')">全选<br/>
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>

</form>

<SCRIPT LANGUAGE="JavaScript">
function checkAll(str)
{
  var a = document.getElementsByName(str);
  var n = a.length;
  for (var i=0; i<n; i++)
  a[i].checked = window.event.srcElement.checked;
}
function checkItem(str)
{
  var e = window.event.srcElement;
  var all = eval("document.hrong."+ str);
  if (e.checked)
  {
    var a = document.getElementsByName(e.name);
    all.checked = true;
    for (var i=0; i<a.length; i++)
    {
      if (!a[i].checked){ all.checked = false; break;}
    }
  }
  else all.checked = false;
}
</SCRIPT>

身份证严格验证：
<script>
var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"}

function cidInfo(sId){
 var iSum=0
 var info=""
 if(!/^\d{17}(\d|x)$/i.test(sId))return false;
 sId=sId.replace(/x$/i,"a");
 if(aCity[parseInt(sId.substr(0,2))]==null)return "Error:非法地区";
 sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2));
 var d=new Date(sBirthday.replace(/-/g,"/"))
 if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))return "Error:非法生日";
 for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11)
 if(iSum%11!=1)return "Error:非法证号";
 return aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女")
}

document.write(cidInfo("380524198002300016"),"<br/>");
document.write(cidInfo("340524198002300019"),"<br/>")
document.write(cidInfo("510215198108241648"),"<br/>")
document.write(cidInfo("34052419800101001x"),"<br/>");
</script>