function checkplugin(){

} 

/*
	if( navigator.userAgent.indexOf("MSIE")>=0 && navigator.appVersion.indexOf("Win") != -1) {
			if(self!=top) {

				top.window.locaiton = this.window.location;

			} else if(document.all) {


				// Detect if Macromedia Flash Player 6 is enabled
				var MM_contentVersion = 6;
				var plugin = (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"]) ? navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0;
				if ( plugin ) {
						var words = navigator.plugins["Shockwave Flash"].description.split(" ");
					    for (var i = 0; i < words.length; ++i) {
							if (isNaN(parseInt(words[i])))
								continue;
							var MM_PluginVersion = words[i];
					}
					var MM_FlashCanPlay = MM_PluginVersion >= MM_contentVersion;
				} else if (navigator.userAgent && navigator.userAgent.indexOf("MSIE")>=0 && (navigator.appVersion.indexOf("Win") != -1)) {
						document.write('<SCR' + 'IPT LANGUAGE=VBScript\> \n'); //FS hide this from IE4.5 Mac by splitting the tag
						document.write('on error resume next \n');
						document.write('MM_FlashCanPlay = ( IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & MM_contentVersion)))\n');
						document.write('</SCR' + 'IPT\> \n');
				}

				// If Macromedia Flash Player 6 is installed
				if ( MM_FlashCanPlay ) {
				} else {
					window.location='/edu_platform/use_flash.html';
					//document.write(' 抱歉！請先安裝 Macromedia Flash Player 6 或以上後才來訪本站，謝謝！');
				}

			} else {

				lets_surrender();

			}

	} else {

		lets_surrender();

	}
*/

function lets_surrender() {
	window.location='/edu_platform/use_ie.html';
	//document.write(' 抱歉！請使用 Microsoft Internet Explorer 6 或以上的瀏覽器來訪本站，謝謝！');
}

function f_is_ie6up(){

    var agt=navigator.userAgent.toLowerCase();
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);
    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
    var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
    var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);
    
    return (is_ie6 || is_ie6up);
}