很不错的使用频率比较高的JS函数

yibin 2015-02-09 建站源码 501

把下面的这个做成一个js文件,然后就可以在任何页面调用了.

function doInputConnotEmpty(txtInput,minLength,sAlert){
txtInput.value=Trim(txtInput.value);
var m_IsValid=true;
if(IsEmpty(txtInput.value)) m_IsValid=false;
if(minLength>0){
if(txtInput.value.length<minLength) m_IsValid=false;
}
if(!m_IsValid){
if(sAlert!="") window.alert(sAlert);
txtInput.focus();
}
return m_IsValid;
}

// 将一个变量转换为对象
function var_to_obj(val)
{
this.value=val;
}
// 判断是否大于某个数
function is_greater(field,crit,limit)
{
var Ret = (is_numeric(field,-1) ) ? (field.value > limit ) : false;
if (!Ret)
doCritCode(field,crit,"Value must be greater than "+limit);
return(Ret);
}
// 判断是否小于某个数
function is_less(field,crit,limit)
{
var Ret = (is_numeric(field,-1) ) ? (field.value < limit ) : false;
if (!Ret)
doCritCode(field,crit,"Value must be less than "+limit);
return(Ret);
}

function is_numeric(field,crit,msg)
{
var Ret = true;
var NumStr="0123456789";
var decUsed=false;
var chr;
for (i=0;i<field.value.length;++i)
{
chr=field.value.charAt(i);
if (NumStr.indexOf(chr,0)==-1)
{
if ( (!decUsed) && chr==".")
{
decUsed=true;
}
else
{
Ret=false;
}
}
}
if (!Ret)
doCritCode(field,crit,msg);
return(Ret);
}
// 判断是否是价格
function is_price(field,crit,msg)
{
var Ret = true;
var NumStr="0123456789";
var decUsed=false;
var chr;
for (i=0;i<field.value.length;++i)
{
chr=field.value.charAt(i);
if (NumStr.indexOf(chr,0)==-1)
{
if ( (!decUsed) && chr==".")
{
decUsed=true;
}
else
{
Ret=false;
}
}
}
if(Ret)
{
if(decUsed&&(field.value.length-field.value.indexOf('.')<4))
;
else if(decUsed)
Ret=false;
}
if (!Ret)
doCritCode(field,crit,msg);
return(Ret);
}

// 判断是否是空
function is_null(field,crit,msg)
{
var Text=""+ Trim(field.value);
if(Text.length)
{ for(var i=0;i<Text.length;i++)
if(Text.charAt(i)!=" "&&Text.charAt(i)!=" ")
break;
if(i>=Text.length){
Ret=true;}
else{
Ret=false;}
}
else
Ret=true;
if (Ret)
doCritCode(field,crit,msg);
return(Ret);
}
function IsSpace(field)
{
var Text=""+field.value;
if(Text.length)
{
for(var i=0;i<Text.length;i++)
if(Text.charAt(i)!=" "&&Text.charAt(i)!=" ")
break;
if(i>=Text.length)
field.value="";
}
}

function doCritCode(field,crit,msg)
{
if ( (-1!=crit) )
{
alert(msg)
if (crit==1)
{
field.focus(); // focus does not work on certain netscape versions
field.select();
}
}
}
// 判断是否是整数
function is_int(field,crit,msg){
var Ret = true;
var NumStr="0123456789";
var chr;
if (field.value.length==0)
{
Ret=false;
}
for (i=0;i<field.value.length;++i)
{
chr=field.value.charAt(i);
if (NumStr.indexOf(chr,0)==-1)
{
Ret=false;
}
}
if (!Ret)
doCritCode(field,crit,msg);
return(Ret);
}
// 判断是否是日期
function is_date(field,crit,msg){
var Ret = false;
var mark1;
var mark2;
var days;
var y;
var m;
var d;
if(field.value=="")
return true;
cd=new Date();

if ( (mark1 = field.value.indexOf('-'))==-1)
mark1=field.value.indexOf('-')
if (mark1>-1)
{
if ( (mark2 = field.value.indexOf('-',mark1+1)) ==-1)
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);
}

function doCrit(field,crit,msg)
{
if ( (-1!=crit) )
{
alert(msg);
if (crit==1)
{
field.focus(); // focus does not work on certain netscape versions
}
}
}
// 判断是否有有效数据被选中
function isselected(field,crit,msg)
{
value=""+field.options[field.selectedIndex].value;
if(value=="0")
Ret=false;
else
Ret=true;
if (!Ret)
doCrit(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;
}

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