// JavaScript Document
//检查是否有字段为空
function checkNull(fieldValue)
{
  var i;
  var fieldArray=fieldValue.split(";");
  //检查字段是否为空
  for(i=0;(i<=fieldArray.length-1);i++){
	 var field = fieldArray[i];
	 var fieldName = field.split(",")[0];
	 var fieldHint = field.split(",")[1];
	 if(document.getElementById(fieldName).value==""){
		document.getElementById(fieldName).focus();
		alert(fieldHint);
		return false;			
     }	
  }
}
//检查两个字段是否相等
function checkequal(fieldlist,hintstr)
{
  var fieldA=document.getElementById(fieldlist.split(";")[0]).value;
  var fieldB=document.getElementById(fieldlist.split(";")[1]).value;
  if (fieldA!=fieldB){
      alert(hintstr);
      return false;
  }
}
//检查电子邮件是否正确
function isEmail(fieldname) {
  var strEmail = document.getElementById(fieldname).value; 
  if (strEmail=="")return true;
  if (strEmail.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
   return true;
  else {
     alert(decodeURI("Email%E6%A0%BC%E5%BC%8F%E4%B8%8D%E6%AD%A3%E7%A1%AE!"));
	 document.getElementById(fieldname).focus();
	 return false;
  }
}
//检查网址是否正确
function isHttp(fieldname){
   var url=document.getElementById(fieldname).value; 
   var   reg=/^http:\/\//;   
   if(url.match(reg)!=null)   
      return true;
   else {
      alert(decodeURI("%E7%BD%91%E5%9D%80%E9%94%99%E8%AF%AF%EF%BC%81"))
      document.getElementById(fieldname).focus();
	  return false;
     } 
}
//检查是否是数字
function checknumber(string){
	var letters = "1234567890";
	var i,c;
	for(i=0;i<string.lenght;i++){
		 c = string.charAt(i);
		 if((letters.indexOf(c))==-1)return true;
	}
	return false;
}
//检查是否由数字各字母构成用户名
function ischeckuser(uname){   
   var reg = /^(\w|[\u4E00-\u9FA5])*$/;
   if(arr=uname.match(reg))
   {}else{
     //alert("用户名只允许为英文，数字和汉字的混合,\n请检查是否前后有空格或者其他符号");
     return false;}  
  }