汇总：一些不错的使用频率比较高的JS函数(2)

2008-02-23 08:09:24来源：互联网阅读 ()

mark2=field.value.indexOf('-',mark1 1);
if ((mark2>-1)&&(mark2 1<field.value.length) )
{
y = parseInt(field.value.substring(0,mark1),10);
m = parseInt(field.value.substring(mark1 1,mark2),10);
d = parseInt(field.value.substring(mark2 1,field.value.length),10);

year = new var_to_obj(y);
month = new var_to_obj(m);
day = new var_to_obj(d);
days = getDaysInMonth(month.value,year.value) 1;

if (
(is_greater(day,-1,0))&&(is_less(day,-1,days))&&
(is_greater(month,-1,0))&&(is_less(month,-1,13))&&
(is_greater(year,-1,1900))&&(is_less(year,-1,2500))
)
Ret=true;
}
}
if (!Ret) doCritCode(field,crit,msg);

return(Ret);
}

// 检查是否是字符
// cCharacter：输入值
function isCharacter( cCharacter )
{
var sFormat = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

if( sFormat.indexOf( cCharacter, 0 ) == -1 )
{
return false;
}

return true;
}

//判断是否是数字和字母的组合
function isChrandNum( cCharacter )
{
for(ilen=0;ilen<str.length;ilen )
{
if(str.charAt(ilen) < '0' || str.charAt(ilen) > '9' )
{
if(str.charAt(ilen) < 'a' || str.charAt(ilen) > 'z' )
{
if(str.charAt(ilen) < 'A' || str.charAt(ilen) > 'Z' )
return false;
}
}
}
return true;
}

// 检查是否是其它可以作名称的字符
// cCharacter：输入值
function isOtherNameCharacter( cCharacter )
{
var sFormat = "_";

if( sFormat.indexOf( cCharacter, 0 ) == -1 )
{
return false;
}

return true;
}
function isOtherNameCharacter1( cCharacter )
{
var sFormat = "-";

if( sFormat.indexOf( cCharacter, 0 ) == -1 )
{
return false;
}

return true;
}

function isOtherNameCharacter2( cCharacter )
{
var sFormat = ".";

if( sFormat.indexOf( cCharacter, 0 ) == -1 )
{
return false;
}

return true;
}

// 检查是否是可以作名称的字符
// sValue：输入值
function isNameCharacter( sValue )
{
if( sValue == null )
{
return false;
}

for( i = 0; i < sValue.length; i )
{
var cCharacter = sValue.charAt( i );
if( isDigital( cCharacter ) == false && isCharacter( cCharacter ) == false && isOtherNameCharacter( cCharacter ) == false&& isOtherNameCharacter1( cCharacter ) == false&& isOtherNameCharacter2( cCharacter ) == false )
{
return false;
}
}

return true;
}
//检查是否是密码
function ispassword( sValue )
{
if( sValue == null )
{
return false;
}

return true;
}

// 检查是否是Email
// sValue：输入值，合法格式为a@b.c.d此类形式
function isEmail( sValue )
{
var iFirstIndex = 0;
var iSecondIndex = sValue.indexOf( '@' );
if( iSecondIndex == -1 )
{
return false;
}

var sTemp = sValue.substring( iFirstIndex, iSecondIndex );
if( isNameCharacter( sTemp ) == false )
{
return false;
}

iSecondIndex = sValue.indexOf( '.' );
if( iSecondIndex == -1 || sValue.substring( sValue.length-1, sValue.length ) == '.' )
{
return false;
}
else if( sTemp.length == sValue.length - 2 ) // The last two characters are '@' and '.'
{
return false;
}
else
{
var sTempValue = sValue;
iSecondIndex = sValue.indexOf( '@' );
while( iSecondIndex != -1 )
{
iFirstIndex = iSecondIndex 1;
sTempValue = sTempValue.substring( iFirstIndex, sTempValue.length ); // The right section of value
iSecondIndex = sTempValue.indexOf( '.' );
//document.write( "sTempValue=" sTempValue "<br>" );
sTemp = sTempValue.substring( 0, iSecondIndex );
//document.write( "sTemp=" sTemp "<br>" );
if( isNameCharacter( sTemp ) == false )
{
return false;
}
}