//检查是否输入手机号
function InputCheck(form)
{
    if (form.Mobile.value=="")
	   { alert("请输入手机号！");
	     form.Mobile.focus();
	     return false; }
    else
	   { return true;}
}


//弹出搜索窗口
function OpenSearchWindow(form,htm,NetWinName){
    if (form.Keyword.value=="")
	   { alert("请输入检索关键字！");
	     form.Keyword.focus();
	     return false; }
    else
	   { if (form.LM.value=="")
	        { alert("请选择检索范围！");
	          form.LM.focus();
	          return false; }
	     else
		    { if (form.field.value=="")
	             { alert("请选择检索方式！");
	               form.field.focus();
	               return false; }
			  else
				 { window.open(htm,NetWinName,'status=no,location=no,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,width=790,height=480,top=0,left=0');
	               form.action="http://www.zsnews.cn/search/result.asp"; }
			}
	   }
  }


//检查非法字符
function CheckSign(str)
{  if ((str.search("'")!= -1)||(str.search("\"")!= -1))
       return true;
   else 
       return false;
}

//验证帐号和密码的合法性
function isValidUserID(checkStr)
{   //( 请输入英文字母、数字或下划线，不区分大小写。)
	var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
	var allValid = true;
	if (checkStr.length<1)
	allValid=false;
	for (i=0;i<checkStr.length;i++)
	{
	ch=checkStr.charAt(i);
	for(j=0;j<checkOK.length;j++)
	if(ch==checkOK.charAt(j))
	break;
	if(j==checkOK.length)
	{
	allValid = false;
	break;
	}
	}
	return allValid;
}

//去掉字符串前后空格
function Jtrim(str)
{
        var i = 0;
        var len = str.length;
        if ( str == "" ) return( str );
        j = len -1;
        flagbegin = true;
        flagend = true;
        while ( flagbegin == true && i< len)
        {
           if ( str.charAt(i) == " " )
                {
                  i=i+1;
                  flagbegin=true;
                }
                else
                {
                        flagbegin=false;
                }
        }

        while  (flagend== true && j>=0)
        {
            if (str.charAt(j)==" ")
                {
                        j=j-1;
                        flagend=true;
                }
                else
                {
                        flagend=false;
                }
        }

        if ( i > j ) return ("")

        trimstr = str.substring(i,j+1);
        return trimstr;
}

//获取字符串长度
function getStrLength(str)
{
	var L;
	var arr;
	L=0;
	arr=str.split("");

	for (var I=0;I<=arr.length-1;I++)
	{
		if (arr[I].charCodeAt(0)<129)
			L++;
		else
			L=L+2;
	}
	return L
}



//判断是否数值型
function isDigital(checkStr)
{
var checkOK = "0123456789";
var allValid = true;
if (checkStr.length<1)
 allValid=false;
  for (i=0;i<checkStr.length;i++)
  {
    ch=checkStr.charAt(i);
    for(j=0;j<checkOK.length;j++)
      if(ch==checkOK.charAt(j))
        break;
    if(j==checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  return allValid;
}