// trim string

function trim(str)

{

    if(!str || typeof str != 'string')

        return null;



    return str.replace(/^[\s]+/,'').replace(/[\s]+$/,'').replace(/[\s]{2,}/,' ');

}



// check valid/invalid email address

function email_check(str) 

{

	var at="@"

	var dot="."

	var lat=str.indexOf(at)

	var lstr=str.length

	var ldot=str.indexOf(dot)

	if (str.indexOf(at)==-1){

	   return false

	}



	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){

	   return false

	}



	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){

		return false

	}



	 if (str.indexOf(at,(lat+1))!=-1){

		return false

	 }



	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){

		return false

	 }



	 if (str.indexOf(dot,(lat+2))==-1){

		return false

	 }

	

	 if (str.indexOf(" ")!=-1){

		return false

	 }



	 return true					

}



// create pop-up window

function popUp(URL, width, height, left, top) {

	day = new Date();

	id = day.getTime();

	eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=1,menubar=0,resizable=1,width=" + width + ",height=" + height + ",left=" + left + ",top=" + top + "');");

}



//redirect to given url

function redirect(URL)

{

	window.location=URL;

}



// count text inside textbox/textarea & display it in real time

function textCounter(field, countfield, maxlimit) 

{

	if (field.value.length > maxlimit)

		field.value = field.value.substring(0, maxlimit);

	else 

		countfield.value = maxlimit - field.value.length;

}



// check valid/invalid username address

function validateUsername(fld) {

    var error = "";

    var illegalChars = /\W/; // allow letters, numbers, and underscores

 

    if (fld.value == "") {

        error = "&bull; Please enter Username<br>";

    } else if ((fld.value.length < 5) || (fld.value.length > 15)) {

        error = "&bull; Username must have 5-15 characters<br>";

    } else if (illegalChars.test(fld.value)) {

		error = "&bull; Please enter valid Username. Use only numbers and alphabets<br>";

    } else {

        error = "";

    }

    return error;

}





//===================== commonly used javascript on admin pages ========================

//CHECK ALL RECORDS

function check_list() 

{

    var theForm = document.frmList;

	if(theForm.check_all.checked==true)

		a=1;

	else

		a=0;

		

    for (i=1; i<theForm.elements.length; i++) 

	{

        if (theForm.elements[i].name=='mycheckbox[]')

            theForm.elements[i].checked = a;

    }

}





//CHECKS THAT ANY RECORD IS CHECKED OR NOT

function any_checked()

{

	var theForm = document.frmList;

	var check_flag=0;

	

	for (i=0; i<theForm.elements.length; i++) 

	{

   		if(theForm.elements[i].checked==true)

            check_flag=1;

    }

	

	if(check_flag==1)

		return true;

	else

		return false;

}

//========================================================================================



function IsNumeric(s)

{

	return (s.toString().search(/^-?[0-9]+$/) == 0);



	/*var ValidChars = "0123456789";

	var IsNumber=true;

	var Char;



	for (i = 0; i < sText.length && IsNumber == true; i++) 

	{ 

		Char = sText.charAt(i); 

		if (ValidChars.indexOf(Char) == -1) 

		{

			IsNumber = false;

		}

	}

	return IsNumber;*/

}



function IsDecimal(sText)

{

	var ValidChars = "0123456789.";

	var IsDecimal=true;

	var Char;



	for (i = 0; i < sText.length && IsDecimal == true; i++) 

	{ 

		Char = sText.charAt(i); 

		if (ValidChars.indexOf(Char) == -1) 

		{

			IsDecimal = false;

		}

	}

	return IsDecimal;

}