function $() // given an array of ids, returns an array of objects
{
	var elements = new Array();
	
	for (var i = 0; i < arguments.length; i++) 
	{
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}

function validate_filename(file_name) // validates a string as a email id
{
	var filenameReg = "^[\\w]\.[\\w]$";
	var regex = new RegExp(filenameReg);
	return regex.test(file_name);
}

function validate_email(email_txt) // validates a string as a email id
{
	var emailReg = "^[\\w-_\.]*[\\w-_\.]\@([\\w].+)\.[\\w]$";
	var regex = new RegExp(emailReg);
	return regex.test(email_txt);
}

function validate_integer(int_str) // validates a string as an integer (i.e. no decimal points)
{
	regExpr = new RegExp(/^\d*$/);
	var regex = new RegExp(regExpr);
	return regex.test(int_str);
}

function validate_real_nos(real_nos_str) // validates a string as a Real Number (i.e. with decimal points)
{
	regExpr = new RegExp(/^-?\d*(\.\d{1,2})?$/);
	var regex = new RegExp(regExpr);
	return regex.test(real_nos_str);
}

function RoundOff(number,n) // rounds up given no to 'n' number of places
{
	str='';
	number=parseFloat(number);
	if(!isNaN(number))
	{
		power=Math.pow(10,n);
		number=Math.round(number*power)/power;
		return number;
	}
}

function str_trim(str) // strips of leading and following whitespaces from a string
{	
	if(str.length > 0)
		while(str.charAt(0)==' ')
			str = str.substr(1);
		
	if(str.length > 0)
		while(str.charAt((str.length - 1))==' ')
			str = str.substring(0, str.length-1);
	
	return str;
}

function str_implode(arr, delim) // Join array elements with a string
{
	var ret_str = "";
	var arr_len = 0;

	arr_len = arr.length;
	delim_len = delim.length;
	
	if(arr_len > 0)
	{
		for(var i=0; i < arr_len; i++)
			ret_str += delim + arr[i];

		if(ret_str.substr(0, delim_len))
			ret_str = ret_str.substr(delim_len);
	}
	
	return ret_str;
}

function str_explode(arr, delim)
{
	var ret_str = "";
	var arr_len = 0;

	arr_len = arr.length;
	delim_len = delim.length;
	
	if(arr_len > 0)
	{
		for(var i=0; i < arr_len; i++)
			ret_str += delim + arr[i];

		if(ret_str.substr(0, delim_len))
			ret_str = ret_str.substr(delim_len);
	}
	
	return ret_str;
}

function CheckNum(obj) // validates a form ctrl for an integer
{
	regExpr = new RegExp(/^\d*$/);

	if(str_trim(obj.value)!="")
	{
		if(!regExpr.test(obj.value))
		{
			alert("Please Enter Valid Numbers");
			obj.value="0";		
		}
	}
	else
		obj.value="0";		
}

function CheckRealNum(obj) // validates a form ctrl for a real number
{
	regExpr=new RegExp(/^-?\d*(\.\d{1,2})?$/);
	
	if(str_trim(obj.value)!="")
	{
		if(!regExpr.test(obj.value))
		{
			alert("Please Enter Valid Amount");
			obj.value="0";		
		}
	}
	else
		obj.value="0";		
}

// NAVIGATION BASED
function AddAnother()
{
	if(Validate())
	{
		document.forms[0].add_mode.value = "Y";
		document.forms[0].submit();
	}
	else
		document.forms[0].add_mode.value = "N";
}

function GoToPage(page)
{
	window.document.location.href=page;
}

function ConfirmDelete(txt, page)
{
	var msg = "You Are About To Delete this " + txt + "! Continue?";

	if(confirm(msg))
		window.document.location.href=page;
}

function SubmitToThisPage(frm_nm, ctrl_nm, page_name)
{
	var page_no = document.getElementById(ctrl_nm).value;	
	var frm = eval("document."+frm_nm);
	
	frm.action = page_name+"?page="+page_no;
	frm.submit();
}

function SubmitPage(frm_nm, page)
{
	var frm = eval("document."+frm_nm);	
	frm.action = page;
	frm.submit();
}

function DefaultFocus(ctrl_nm)
{
	if(document.getElementById(ctrl_nm))
	{
		obj = document.getElementById(ctrl_nm);
		obj.focus();
	}
}

function SetFocus(obj)
{
	obj.focus();
	obj.select();
}

function UploadMailerPics()
{
	info="upload_images.php";
	window.open(info,"","menubars=0,width=500,height=550,scrollbars=1,resizable=1");
}

function ChangeRank(mode, fld, fld_val)
{
	var str = "";

	if(fld != "" && fld_val != "")
		str = "&fld=" + fld + "&fld_val=" + fld_val;

	var file = "rank-update.php?mode="+mode+str;
	win = window.open(file,'ChangeRank','width=900,height=600,scrollbars=1,resizable=1');
	WindowPosition(900,600,win);
}

function PricingChangeRank(mode, fld, fld_val) // mode, condition fld, condition value
{
	var str = "";

	if(fld != "" && fld_val != "")
		str = "&fld=" + fld + "&fld_val=" + fld_val;
	
	//alert(str);
	var file = "pricing_rank_update.php?mode="+mode+str;
	win = window.open(file,'ChangeRank','width=900,height=600,scrollbars=1,resizable=1');
	WindowPosition(900,600,win);
}

function ChangeImageRank(mode, fld, fld_val)
{
	var str = "";

	if(fld != "" && fld_val != "")
		str = "&fld=" + fld + "&fld_val=" + fld_val;
	var file = "image-rank-update.php?mode="+mode+str;
	win = window.open(file,'ChangeRank','width=900,height=600,scrollbars=1,resizable=1');
	WindowPosition(900,600,win);
}

function OpenPopup(file)
{
	win = window.open(file,'Popup','width=600,height=450,scrollbars=1');
	WindowPosition(600,450,win);
}

function WindowPosition(widthX,heightX,windowName)
{
	var width = (screen.width);
	var height = (screen.height - 25);
	var centerleft = 0;
	var centertop = 0;
	var centerleft = (width/2) - (widthX/2);
	var centertop = (height/2) - (heightX/2);
	var width=widthX;
	var height=heightX;
	windowName.moveTo(centerleft,centertop);
	windowName.resizeTo(width, height);
	windowName.focus();
}

function WindowPosition2(widthX,heightX,windowName) //same as above, only it takes %age vals as params for width n height
{
	var width = (screen.width);
	var height = (screen.height - 25);
		
	var wt = (width * widthX) / 100;
	var ht = (height * heightX) / 100;

	var centerleft = (width/2) - (wt/2);
	var centertop = (height/2) - (ht/2);

	windowName.resizeTo(wt, ht);
	windowName.moveTo(centerleft,centertop);
	windowName.focus();
}

function FillFromList(list_obj)
{
	var cmb = list_obj;

	str = "";
		
	for(i=0; i < cmb.length; i++)
		if(cmb.options[i])
			str += "~" + cmb.options[i].value;
	
	return str.substr(1);
}

function checkSpace(box)
{
	var val = box.value
	var carCode = event.keyCode;
	
	//alert("HI");
	
	if(val=="")
	{			
		if ( carCode == 32) 
		{			
			event.cancelBubble = true;
			event.returnValue = false;
			return;
		}
	}	
}

function checkFileName(x)
{
	a=new Array();
	s=x.value;
	
	//alert(s);
	
	for(i=0; i<s.length; i++)
		a[i]=s.charAt(i);

	dot = s.indexOf(".");

	if (dot == -1)
	{
		x.focus()
		alert ("Please Check File Name Extension (.html, .htm or .php).");
		return 0;
	}

	str1=s.substring(dot+1,s.length);
	
	//alert(str1);
	
	if((str1.length<3))
	{
		x.focus()     
		alert ("Please Check File Name Extension (html, htm or php).");
		return 0;
	}

	return 1;
}

var newwindow = '';
function popitup(url) 
{
	if (newwindow.location && !newwindow.closed) 
	{
		newwindow.location.href = url;
		newwindow.focus(); 
	}
	else 
	{
		newwindow=window.open(url,'htmlname','width=404,height=316,resizable=1');
	}
}

function tidy() 
{
	if (newwindow.location && !newwindow.closed) 
	{
	   newwindow.close(); 
	 }
}


function hourglass() 
{
	var width = (screen.width) - 155;
	var height = (screen.height - 125);
	var centerleft = 0;
	var centertop = 0;
	var centerleft = (width/2) - (32/2);
	var centertop = (height/2) - (32/2);
	document.all.hiddenDIV.style.top=centertop;
	document.all.hiddenDIV.style.left=centerleft;
	document.all.hiddenDIV.style.visibility="visible";
	doHourglass();
}

function removehourglass()
{
	undoHourglass();
	document.getElementById("hiddenDIV").style.visibility="hidden"; 
}

function doHourglass()
{
	document.body.style.cursor = 'wait';
}

function undoHourglass()
{
	document.body.style.cursor = 'default';
}