String.prototype.trim=function String_trim() { return this.replace(/^ +| +$/g,''); }

function isValidInput(value) { 
	return (value.indexOf(String.fromCharCode(160)) == -1 && value.indexOf("\\") == -1) 
}

function checkEmail(email) {
	//return (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(email));
	return (/^[_\.0-9a-zA-Z-]+\@([0-9a-zA-Z-]+\.)+[a-zA-Z]{2,4}$/.test(email));
}

function isIEBrowser() {
	var sAgent = navigator.userAgent.toLowerCase() ;
	return ( sAgent.indexOf("msie") != -1 && sAgent.indexOf("mac") == -1 && sAgent.indexOf("opera") == -1 )
}

function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft
		curtop = obj.offsetTop
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	return [curleft,curtop];
}

function getPageSize() {
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} 
	else if (document.body.scrollHeight > document.body.offsetHeight){
		// all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} 
	else {
		// Explorer Mac...would also work in Explorer 6 Strict,
		// Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}

    var windowWidth, windowHeight;
    if (self.innerHeight) {      // all except Explorer
    	windowWidth = self.innerWidth;
    	windowHeight = self.innerHeight;
    } 
	else if (document.documentElement && document.documentElement.clientHeight) {
		// Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
    } 
	else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
    }

    // for small pages with total height less then height of the viewport
    if (yScroll < windowHeight){
		pageHeight = windowHeight;
    } 
	else {
		pageHeight = yScroll;
    }

    // for small pages with total width less then width of the viewport
    if (xScroll < windowWidth){
		pageWidth = windowWidth;
    } 
	else {
		pageWidth = xScroll;
    }

    return {
    	'pageWidth':pageWidth,
    	'pageHeight':pageHeight,
    	'windowWidth':windowWidth,
    	'windowHeight':windowHeight,
     	'yScroll':yScroll,
    	'xScroll':xScroll
    };
}