function mainImageRandom(){
	var mainImage = new Array("top_mainimage_001.jpg","top_mainimage_001.jpg","top_mainimage_007.gif","top_mainimage_009.jpg","top_mainimage_008.jpg","top_mainimage_009.jpg");
	var mainUrl = new Array("http://eg.04510.jp/","http://eg.04510.jp/","http://eg.04510.jp/","/contents/d/king/index4.html","/app/m/staff/a/S14/","/contents/d/king/index4.html");
	var randomInt = Math.floor(Math.random()*61);

	if(randomInt<10){
		var imageNum = 0;
	}else if(randomInt<20){
		var imageNum = 1;
	}else if(randomInt<30){
		var imageNum = 2;
	}else if(randomInt<50){
		var imageNum = 3;
	}else if(randomInt<60){
		var imageNum = 5;
	}else{
		var imageNum = 4;
	}

	document.write('<a href="' + mainUrl[imageNum] +'"><img src="/_img/S/' + mainImage[imageNum] + '" alt="工場求人情報なら工場ワークス！" width="154" height="104" title="工場求人情報なら工場ワークス！" /></a>');
}

function showPlagin(idno){
pc = ('PlagClose' + (idno));
po = ('PlagOpen' + (idno));
if( document.getElementById(pc).style.display == "none" ) {
document.getElementById(pc).style.display = "block";
document.getElementById(po).style.display = "none";
}
else {
document.getElementById(pc).style.display = "none";
document.getElementById(po).style.display = "block";
}
}