//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
{
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 { 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
{ for (jj=0;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
{ if (a.charAt(k) != " ") j = j+1; k = k+1; } if (j==0) { return 0; } if (i!=j) { return 2; } else { return 1; } }

