//opt1 小数 opt2 负数
//当opt2为1时检查num是否是负数
//当opt1为1时检查num是否是小数
//返回1是正确的,0是错误的
function chknbr(num,opt1,opt2)
{
var i=num.length;
var staus;
//staus用于记录.的个数
status=0;
if ((opt2!=1) && (num.charAt(0)=='-'))
{
//alert("You have enter a invalid number.");
return 0;
}
//当最后一位为.时出错
if (num.charAt(i-1)=='.')
{
//alert("You have enter a invalid number.");
return 0;
}
for (j=0;j<i;j )
{
if (num.charAt(j)=='.')
{
status ;
}
if (status>1)
{
//alert("You have enter a invalid number.");
return 0;
}
if (num.charAt(j)<'0' || num.charAt(j)>'9' )
{
if (((opt1==0) || (num.charAt(j)!='.')) && (j!=0))
{
//alert("You have enter a invalid number.");
return 0;
}
}
}
return 1;
}
//函数名:chkdate
//功能介绍:检查是否为日期
//参数说明:要检查的字符串
//返回值:0:不是日期 1:是日期
function chkdate(datestr)
{
var lthdatestr
if (datestr != "")
lthdatestr= datestr.length ;
else
lthdatestr=0;
var tmpy="";
var tmpm="";
var tmpd="";
//var datestr;
var status;
status=0;
if ( lthdatestr== 0)
return 0
for (i=0;i<lthdatestr;i )
{ if (datestr.charAt(i)== '-')
{
status ;
}
if (status>2)
{
//alert("Invalid format of date!");
return 0;
}
if ((status==0) && (datestr.charAt(i)!='-'))
{
tmpy=tmpy datestr.charAt(i)
}
if ((status==1) && (datestr.charAt(i)!='-'))
{
tmpm=tmpm datestr.charAt(i)
}
if ((status==2) && (datestr.charAt(i)!='-'))
{
tmpd=tmpd datestr.charAt(i)
}
}
year=new String (tmpy);
month=new String (tmpm);
day=new String (tmpd)
//tempdate= new String (year month day);
//alert(tempdate);
if ((tmpy.length!=4) || (tmpm.length>2) || (tmpd.length>2))
{
//alert("Invalid format of date!");
return 0;
}
if (!((1<=month) && (12>=month) && (31>=day) && (1<=day)) )
{
//alert ("Invalid month or day!");
return 0;
}
if (!((year % 4)==0) && (month==2) && (day==29))
{
//alert ("This is not a leap year!");
return 0;
}
if ((month<=7) && ((month % 2)==0) && (day>=31))
{
//alert ("This month is a small month!");
return 0;
}
if ((month>=8) && ((month % 2)==1) && (day>=31))
{
//alert ("This month is a small month!");
return 0;
}
if ((month==2) && (day==30))
{
//alert("The Febryary never has this day!");
return 0;
}
return 1;
}
//函数名:chksafe
//功能介绍:检查是否含有"'",'\\',"/"
//参数说明:要检查的字符串
//返回值:0:是 1:不是
function chksafe(a)
{
return 1;
/* fibdn = new Array ("'" ,"\\", "、", ",", ";", "/");
i=fibdn.length;
j=a.length;
for (ii=0;ii<i;ii )
{ for (jj=0;jj<j;jj )
{ temp1=a.charAt(jj);
temp2=fibdn[ii];
if (tem';p1==temp2)
{ return 0; }
}
}
return 1;
*/
}
//函数名:chkspc
//功能介绍:检查是否含有空格
//参数说明:要检查的字符串
//返回值:0:是 1:不是
function chkspc(a)
{
var i=a.length;
var j = 0;
var k = 0;
while (k<i)
{
if (a.charAt(k) != " ")
j = j 1;
k = k 1;
}
if (j==0)
{
return 0;
}
if (i!=j)
{ return 2; }
else
{
return 1;
}
}