// JavaScript Document


if (checkheight(640)) {
	loadcentercss();
}
if (checkwidth(870)) {
	loadleftcss();
}

window.onresize = function() {
	if (checkheight(640)) {
		loadcentercss();
	} else {
		setCenterStyleSheet(true);
	}
	if (checkwidth(870)) {
		loadleftcss();
	} else {
		setLeftStyleSheet(true);
	}
}

function checkheight(setheight) {
	var ua = navigator.userAgent; 
	var nHit = ua.indexOf("MSIE");
	var bIE = (nHit >=  0); 
	var centermode = false;
	if (bIE) {
		if (ua.substr(nHit+5, 1) >= "6") {
			if (document.documentElement.clientHeight >= setheight) {
				centermode = true;
			}
		} else {
			if (document.body.clientHeight >= setheight) {
				centermode = true;
			}
		}
	} else {
		if (window.innerHeight >= setheight) {
			centermode = true;
		}
	}
	return centermode;
}

function checkwidth(setwidth) {
	var ua = navigator.userAgent; 
	var nHit = ua.indexOf("MSIE");
	var bIE = (nHit >=  0); 
	var leftmode = false;
	if (bIE) {
		if (ua.substr(nHit+5, 1) >= "6") {
			if (document.documentElement.clientWidth >= setwidth) {
				leftmode = true;
			}
		} else {
			if (document.body.clientWidth >= setwidth) {
				leftmode = true;
			}
		}
	} else {
		if (window.innerWidth >= setwidth) {
			leftmode = true;
		}
	}
	return leftmode;
}

function loadcentercss() {
	if (checkCenterStyleSheet()) {
		setCenterStyleSheet(false);
	} else {
		var cs = document.createElement("link");
		cs.rel="stylesheet";
		cs.href="center.css";
		cs.type="text/css";
		cs.title = "centercss";
		cs.disabled=false;
		document.getElementsByTagName('head')[0].appendChild(cs);
	}
}

function loadleftcss() {
	if (checkLeftStyleSheet()) {
		setLeftStyleSheet(false);
	} else {
		var cs = document.createElement("link");
		cs.rel="stylesheet";
		cs.href="headmenu.css";
		cs.type="text/css";
		cs.title = "leftcss";
		cs.disabled=false;
		document.getElementsByTagName('head')[0].appendChild(cs);
	}
}

function checkCenterStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.title=="centercss") {
			return true;
		}
  }
  return null;
}

function checkLeftStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.title=="leftcss") {
			return true;
		}
  }
  return null;
}

function setCenterStyleSheet(setmode) {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.title=="centercss") {
			a.disabled = setmode;
		}
  }
}


function setLeftStyleSheet(setmode) {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.title=="leftcss") {
			a.disabled = setmode;
		}
  }
}