function getElementsByClassNm(cn){
	var arr = new Array();
	var els = document.getElementsByTagName("*");
	var exp= new RegExp("^(.* )?"+cn+"( .*)?$", "g");
	for (var i = 0; i < els.length; i++ ){
	if (exp.test(els[i].className)){
	arr.push(els[i]);
	}
	}
	return arr;
}

function changeFontSize(size, line) {
	var i, a, px, ln;
	px = size;
	ln=line;
	a = getElementsByClassNm('resize');
	for (i=0; i<a.length; ++i) {
	a[i].style.fontSize = px + 'px';
	a[i].style.lineHeight = ln + 'px';
	}
	Set_Cookie('pageFontSize',size,30,'/');
	Set_Cookie('pageFontLine',line,30,'/');
}
function Set_Cookie( name, value, expires, path, domain, secure ) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	if ( expires ) {
	expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	document.cookie = name + "=" +escape( value ) +
	( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
	( ( path ) ? ";path=" + path : "" ) +
	( ( domain ) ? ";domain=" + domain : "" ) +
	( ( secure ) ? ";secure" : "" );
}

function Get_Cookie( name ) {
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) &&
	( name != document.cookie.substring( 0, name.length ) ) )
	{
	return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ";", len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}
function setFontSize() {
	var size = Get_Cookie('pageFontSize');
	var line = Get_Cookie('pageFontLine');
	if (size!= "" && line!='')
	changeFontSize(size, line);
}