SetFontStyle();

function SetFontStyle()
{
	var fontRule =
	{
		hiragino  : "font-family:'ヒラギノ角ゴ Pro W3',Osaka,sans-serif;",
		msPGothic : "font-family:'ＭＳ Ｐゴシック',sans-serif;",
		meiryo    : "font-family:'メイリオ',Meiryo,sans-serif;"
	}
	
	var fontStyle = '';
	
	if(navigator.userAgent.match(/Macintosh|Mac_PowerPC/))
	{
		fontStyle = 'html body {' + fontRule.hiragino + '}';
	}
	else if(navigator.userAgent.match(/Windows NT (4|5)\.\d+|windows (98|95|CE)/))
	{
		fontStyle = 'html body {' + fontRule.msPGothic + '}';
	}
	else if(navigator.userAgent.match(/Windows NT (6)\.\d+/) || navigator.userAgent.match(/Windows/))
	{
		fontStyle = 'html body {' + fontRule.meiryo + '}';
	}
	
	
	if (document.createStyleSheet)
	{
		document.createStyleSheet().cssText = fontStyle;
	}
	else
	{
		var elm = document.createElement('style');
		document.getElementsByTagName('head')[0].appendChild(elm);
		elm.sheet.insertRule(fontStyle, 0 )
	}
	
}