var rdmNum;
var code;

var synAry =['syn_h2_01.jpg','syn_h2_02.jpg','syn_h2_03.jpg','syn_h2_04.jpg','syn_h2_05.jpg','syn_h2_06.jpg','syn_h2_07.jpg','syn_h2_08.jpg','syn_h2_09.jpg','syn_h2_10.jpg','syn_h2_11.jpg'];
var arcAry =['arc_h2_01.jpg','arc_h2_02.jpg','arc_h2_03.jpg','arc_h2_04.jpg','arc_h2_05.jpg','arc_h2_06.jpg'];

function randomImg(key){
	if(key == "syn"){
		rdmNum = Math.floor(Math.random()*synAry.length);
		code = "<img src='img/top_img/" + synAry[rdmNum] + "' width='170' height='90' alt='Yamaha Design Synapses' class='thumb'>";
		document.write(code);
	}
	else{
		rdmNum = Math.floor(Math.random()*arcAry.length);
		code = "<img src='img/top_img/" + arcAry[rdmNum] + "' width='170' height='90' alt='Yamaha Design archives' class='thumb'>";
		document.write(code);
	}

}