Here are some functions which are very important in developments.
To Trim the String type text
function Trim(str) {
return str.replace(/^[\s]+/, '').replace(/[\s]+$/, '').replace(/[\s]{2,}/, ' ');
}
function trim(argvalue) {
var tmpstr = ltrim(argvalue);
return rtrim(tmpstr);
}
Check the Text field no of characters
function NoOfCharacters(ctrl) {
return ctrl.value.length;
}
To Get the Part of a String
Function Substring(str,startValue,endValue) {
return ctrl.substring(startValue,endValue);
}
Eg:
Substring('ABCDE',0,1)
'A'
To Split a Text
1)
function Splitting(str,SplitBy) {
var arrSplit =str.split(SplitBy);
var intCount = 0;
var strRetVal = '';
while (intCount < arrSplit.length) {
strRetVal += arrSplit[intCount] + ' - ' + '';
intCount += 1;
}
return strRetVal ;
}
Eg:
Splitting('ABC\nDEFG','\n')
'ABC-DEFG'
2)
function customSplit(strvalue, separator, arrayName) {
var n = 0;
if (separator.length != 0) {
while (strvalue.indexOf(separator) != -1) {
eval("arr"+n+" = strvalue.substring(0, strvalue.indexOf(separator));");
strvalue = strvalue.substring(strvalue.indexOf(separator)+separator.length,
strvalue.length+1);
n++;
}
eval("arr" + n + " = strvalue;");
arraySize = n+1;
}
else {
for (var x = 0; x < strvalue.length; x++) {
eval("arr"+n+" = \"" + strvalue.substring(x, x+1) + "\";");
n++;
}
arraySize = n;
}
eval(arrayName + " = new makeArray(arraySize);");
for (var i = 0; i < arraySize; i++)
eval(arrayName + "[" + i + "] = arr" + i + ";");
return arraySize;
}
Eg:
var strvalue = "abc##123##zzz##$$$";
var returnArraySize = customSplit(strvalue, "##", "NewArray");
The above will create the following:
NewArray[0] has value "abc"
NewArray[1] has value "123"
NewArray[2] has value "zzz"
NewArray[3] has value "$$$"
returnArraySize has value "4"
Replace Text
function ReplaceString(str,oldValue,newValue)
{
Return str.replace(oldValue,newValue);
}
Eg:
ReplaceString('Hello World','World','!')
Hello !
Sort Method
//Sort alphabetically and ascending:
var myarray=["Bob", "Bully", "Amy"]
myarray.sort() //Array now becomes ["Amy", "Bob", "Bully"]
//Sort alphabetically and descending:
var myarray=["Bob", "Bully", "Amy"]
myarray.sort()
myarray.reverse() //Array now becomes ["Bully", "Bob", "Amy"]
Custom Sort Method
function customSort(a,b) {
return( a.toString().length - b.toString().length );
}
var arlene = new Array("orange","apple","strawberry","banana");
alert( arlene.sort(customSort).toString() );
Add Space
function addSpace(argvalue, numlength) {
if (! numlength > 0)
numlength = 10;
if (argvalue.length < numlength) {
for(var i = argvalue.length; i < numlength; i++)
argvalue = " " + argvalue;
}
return argvalue;
}
Eg:
addSpace("123.45", 10);
" 123.45"
Highlighted the text in selected textBox
function ShowSelection(textComponent) {
var selectedText;
// IE version
if (document.selection != undefined) {
textComponent.focus();
var sel = document.selection.createRange();
selectedText = sel.text;
}
// Mozilla version
else if (textComponent.selectionStart != undefined) {
var startPos = textComponent.selectionStart;
var endPos = textComponent.selectionEnd;
selectedText = textComponent.value.substring(startPos, endPos)
}
return selectedText;
}
Disable the Key Press event in a text box
function DisableKeyPressEvent(e) {
var unicode = e.charCode ? e.charCode : e.keyCode
if (unicode!=0) //if not a number
{
return false //disable key press
}
}
Select the Item from ComboBox
function SelectComboItem(combo,value)
{
if(value!=null)
{
for (var i=0 ; i <= combo.length; i++)
{
combo.selectedIndex= i;
if (combo[combo.selectedIndex].value==value)
{
combo.selectedIndex= i;
return true;
}
else
{
combo.selectedIndex= 0;
}
}
}
else
{
combo.selectedIndex= 0;
}
}
Set Current Date
function setDate()
{
var currentTime = new Date();
var month = currentTime.getMonth() + 1;
var day = currentTime.getDate();
var year = currentTime.getFullYear();
var dateLast=day+'/'+month+'/'+year;
document.getElementById("txtDate").value=dateLast;
return true;
}
