function getOffsetY(){
	
	var  scrOfY = 0;
		if( typeof( window.pageYOffset ) == 'number' ) {
			//Netscape compliant
			scrOfY = window.pageYOffset;
		} else if( document.body && ( document.body.scrollTop ) ) {
			//DOM compliant
			scrOfY = document.body.scrollTop;
		} else if( document.documentElement && (  document.documentElement.scrollTop ) ) {
			//IE6 standards compliant mode
			scrOfY = document.documentElement.scrollTop;
		}
	
	return scrOfY;
	
}

/*var isLocked = false;*/
var MINHEIGHT = 0;
var PADDING_MAIN = 118;


function getOffset(){
	var y = getOffsetY();

	if( y >= MINHEIGHT ){
		headerFixed();	
	}
	else{
		headerRelative();
	}
	
}

function headerFixed(){
	$('#headerwrapper').css({'position':'fixed','top':'0','left':'0'});
	$('#main').css({'padding-top': PADDING_MAIN + 'px'});

	
	if (navigator.appVersion.indexOf("MSIE") != -1){
		$('#headerwrapper').css({'position':'fixed','top':'0','border-bottom':'1px solid #ccc'});
	}

}

function headerRelative(){
	$('#headerwrapper').css({'position':'relative'});
	$('#main').css({'padding-top':'0'});
	
	if (navigator.appVersion.indexOf("MSIE") != -1){
		$('#headerwrapper').css({'position':'relative','border-bottom':'1px solid #ccc'});
	}
}

/*
function lock() {
	isLocked = true;
	setTimeout("unlock()", 100);
}

function unlock(){
	isLocked = false;
}
*/