// JavaScript Document
function isNumber(val) {
	return /^-?((\d+\.?\d?)|(\.\d+))$/.test(val);
}

function change_parent_url(url) {
	    document.location=url;
}

function isValidEmailAddr(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					
}

function trim(str, chars) {
	if (str == undefined)
		return "";
	else
		return ltrim(rtrim(str, chars), chars);
}
 
function ltrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
	 
function rtrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}


function isAlphanumeric(str){
	var alphaExp = /^[0-9a-zA-Z]+$/;
	if(str.match(alphaExp)){
		return true;
	}else{
		return false;
	}
}

function getURLParam(strParamName){
  var strReturn = "";
  var strHref = window.location.href;
  if ( strHref.indexOf("?") > -1 ){
    var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
    var aQueryString = strQueryString.split("&");
    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
      if ( 
aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") > -1 ){
        var aParam = aQueryString[iParam].split("=");
        strReturn = aParam[1];
        break;
      }
    }
  }
  return unescape(strReturn);
}



// jQuery plugin: PutCursorAtEnd 1.0
// http://plugins.jquery.com/project/PutCursorAtEnd
// by teedyay
//
// Puts the cursor at the end of a textbox/ textarea

// codesnippet: 691e18b1-f4f9-41b4-8fe8-bc8ee51b48d4
(function($)
{
    jQuery.fn.putCursorAtEnd = function()
    {
        return this.each(function()
        {
            $(this).focus()

            // If this function exists...
            if (this.setSelectionRange)
            {
                // ... then use it
                // (Doesn't work in IE)

                // Double the length because Opera is inconsistent about whether a carriage return is one character or two. Sigh.
                var len = $(this).val().length * 2;
                this.setSelectionRange(len, len);
            }
            else
            {
                // ... otherwise replace the contents with itself
                // (Doesn't work in Google Chrome)
                $(this).val($(this).val());
            }

            // Scroll to the bottom, in case we're in a tall textarea
            // (Necessary for Firefox and Google Chrome)
            this.scrollTop = 999999;
        });
    };
})(jQuery);